Frozen snapshot of 9 October 2026 · upstream commit bb25081
The bare feet of a newborn baby on a soft blanket.
Photo: Newborn baby feet (Unsplash).jpg by Janko Ferlič, CC0, via Wikimedia Commons. Cropped and colour-muted for display.
Section 20·14 items·9 October 2026

Caring for a Newborn

safe sleep, the first hepatitis B shot, immunization-program vaccines, breast milk and complementary foods, water temperature for mixing formula, honey, vitamin K, red lines for seeing a doctor with a fever, no shaking, diapers and big-ticket purchases, introducing peanuts early for high-risk babies to prevent allergy, the signs of newborn jaundice that call for a doctor, vitamin B12 supplements when the mother is vegetarian. Outcome type: infant mortality/money.

A 8B 4C 2
Lifespan 12Money 21 contested

Outcome type: infant mortality and money. This section includes only things that bear on whether the child survives or on how much money you spend, and only those where the difference is large enough and the evidence is hard. Child-rearing details such as how to soothe and how to look after a baby are not covered in this book. For what to do before the birth and on the day you leave the hospital, see Section 27.

Sources are reproduced exactly as they appear in the Chinese original, including Chinese titles of laws and quoted statutory text. Original Chinese text of this section at upstream commit bb25081, on GitHub.

Items in this section (14)
  1. AItem 1Put a baby to sleep on their back, on a firm flat surface, in the same room but not the same bed, with nothing soft in the bed
  2. AItem 2Get the first dose of hepatitis B vaccine within 24 hours of birth
  3. AItem 3Get every vaccine in the national immunization program, free from start to finish; if one is missed, make up only the doses not yet completed
  4. AItem 4Feed only breast milk for the first 6 months, not even water; from 6 months add complementary foods and keep breastfeeding
  5. AItem 5Make formula with water at 70 ℃ or above, let it cool before feeding, and pour out what's left
  6. AItem 6Don't give honey to a baby under 1
  7. BItem 7Be sure the baby gets the vitamin K shot at birth
  8. AItem 8If a baby under 3 months has a temperature that reaches 38 ℃, go straight to the hospital; don't watch and wait at home
  9. BItem 9Never shake a baby, no matter how tired or angry you are
  10. CItem 10Choose diapers not by brand but by three things: whether they fit, whether you change them often enough, and whether they have been named in a spot-check notice
  11. CItem 11For big items, consider borrowing, then buying secondhand, then buying new, in that order; don't buy everything at once
  12. AItem 12If your child has severe eczema or an egg allergy, don't avoid peanuts: add them early under a doctor's guidance, but never give whole peanuts
  13. BItem 13Watch for these signs of newborn jaundice: yellow within 24 hours of birth, getting more and more yellow, can't be woken and won't feed, pale stools; go to the hospital the same day
  14. BItem 14If you eat vegetarian while pregnant or breastfeeding, take vitamin B12 every day; the baby's complementary foods should include animal foods, and if you insist on fully vegan, see a doctor first
Section 20, Item 1·Outcome  Lifespan

Put a baby to sleep on their back, on a firm flat surface, in the same room but not the same bed, with nothing soft in the bed

Value for cost High
In plain terms

While your child is a baby, have them sleep lying face up, on a firm flat surface. The adults and the baby sleep in the same room, but not in the same bed. Put no pillows, quilts, bumpers, stuffed toys or head-shaping pillows in the bed. Inclined cradles and baby seats are only for sitting, not for sleeping in as a bed. In the United States alone, about 3500 babies die in their sleep every year.

Cost
No money. Switching to a firm mattress costs a few hundred yuan. The hard part is standing up to what the older generation says and sticking with it all the way No money Done in passing Lots of willpower Benefit size large
Benefit
In the United States, about 3500 babies a year die of sleep-related causes. These include sudden infant death syndrome, unknown causes and accidental suffocation in bed. The safe sleep environment given by the American Academy of Pediatrics is “supine position; use of a firm, non-inclined sleep surface; room sharing without bed sharing; avoidance of soft bedding and overheating.” A few other things also lower the risk: breastfeeding, keeping the baby away from nicotine and alcohol, getting vaccines on schedule, and using a pacifier
Evidence grade
A
Notes
“Nothing soft in the bed” means no pillows, quilts, bumpers, stuffed toys or head-shaping pillows at all. Not even a nursing pillow, though it looks very safe. Inclined cradles and baby seats are not places to sleep. In this section, this item makes the biggest difference, and it is also the one where you most need to stand up to pressure from the older generation
Sources
Moon RY, Carlin RF, Hand I, Task Force on Sudden Infant Death Syndrome and the Committee on Fetus and Newborn (2022). Sleep-Related Infant Deaths: Updated 2022 Recommendations for Reducing Infant Deaths in the Sleep Environment. Pediatrics, 150(1), e2022057990. https://doi.org/10.1542/peds.2022-057990
Section 20, Item 2·Outcome  Lifespan

Get the first dose of hepatitis B vaccine within 24 hours of birth

Value for cost Very high
In plain terms

The baby should get the first dose of hepatitis B vaccine within 24 hours after birth. Of people infected with hepatitis B in infancy and early childhood, about 95% go on to chronic hepatitis. The great majority of those infected only as adults get better on their own. So the earlier this dose is given, the more good it does. If the mother is positive for hepatitis B surface antigen, the baby also needs hepatitis B immune globulin at the same time.

Cost
No money. Hepatitis B vaccine is an immunization program vaccine, so it is free anyway. The baby gets it in the hospital on the day of birth, with no extra trip No money Done in passing No willpower Benefit size large
Benefit
The World Health Organization says: “All infants should receive hepatitis B vaccine as soon as possible after birth (within 24 hours).” The reason is that “about 95% of infections in infancy and early childhood develop into chronic hepatitis.” The great majority of those infected as adults recover on their own (they get better even without treatment)
Evidence grade
A
Notes
If the mother is positive for hepatitis B surface antigen, the baby also needs a shot of hepatitis B immune globulin at the same time after birth. Find this out clearly during prenatal checkups; don't wait until after the birth to ask. For the screening the mother herself should get, see Section 1
Sources
World Health Organization. Hepatitis B fact sheet. https://www.who.int/news-room/fact-sheets/detail/hepatitis-b
Section 20, Item 3·Outcome  Lifespan

Get every vaccine in the national immunization program, free from start to finish; if one is missed, make up only the doses not yet completed

Value for cost High
In plain terms

Vaccines in the national immunization program are free from start to finish, and vaccination units cannot charge for them. When a child enters childcare or school, the vaccination certificate is checked, and missed doses will be found and made up. If one is missed, make up only the doses not yet completed; there is no need to start over, and the series can be continued even with a different manufacturer. Eczema, hives, allergic rhinitis and asthma, as long as the condition is stable, and newborn jaundice as well: with any of these the child can be vaccinated normally.

Cost
No money. The law states that “vaccination units shall not charge any fee for administering immunization program vaccines.” You will need to make several trips to the vaccination clinic as the baby reaches each age in months. Keep the vaccination certificate safe and don't lose it No money A few hours No willpower Benefit size large
Benefit
When a child enters childcare or school, the childcare institution or school must check the vaccination certificate. If they find the child has not received immunization program vaccines as required, they must report it to the vaccination unit and help urge the guardian to have the child catch up. So missed vaccines cannot be put off; they are sure to be found at school entry. The schedule now in effect is the 2026 edition. The human papillomavirus (HPV) vaccine has been added to the national immunization program. The starting age for the DTP (diphtheria, tetanus and pertussis) vaccine has been changed from 3 months to 2 months, for a total of 5 doses, 1 dose each at 2 months, 4 months, 6 months, 18 months and 6 years of age. Age-eligible children in Tibet, Qinghai, Xinjiang and the Xinjiang Production and Construction Corps also routinely receive the Japanese encephalitis vaccine from March 2026. Several vaccines can be given on the same day: at present, all national immunization program vaccines can be given at the same time according to the immunization schedule or the catch-up principles. Two or more injected vaccines go in different sites, and “mixing two or more vaccines in the same syringe for injection is strictly prohibited.” If they are not given on the same day, two or more injected live attenuated vaccines must be spaced no less than 28 days apart. There is no restriction on the interval between inactivated vaccines, oral live attenuated vaccines and other vaccines. For those under 18, the catch-up principle is to catch up as soon as possible; “only the uncompleted doses need to be made up, with no need to restart the full series,” and the same vaccine can be continued with a different manufacturer (nationwide, 2026 edition of the schedule)
Evidence grade
A
Notes
The most common misunderstanding is “the child's constitution is weak, so hold off on vaccines for now.” The official position is that a so-called “allergic constitution,” allergic diseases in the family, and the child having been allergic to a food or medicine before are none of them reasons not to vaccinate. Atopic dermatitis (eczema), hives, allergic rhinitis and bronchial asthma: as long as the condition is stable, the child can be vaccinated normally. A child who is taking anti-allergy medicine or using an inhaled steroid can also be vaccinated. Newborns with physiological jaundice or breast milk jaundice can also be vaccinated normally. There are only two real reasons not to vaccinate: an acute severe allergic reaction to a previous dose of the same vaccine, or a severe allergy to a known component of the vaccine. Children with an immune deficiency, and children currently on chemotherapy or radiotherapy or using immunosuppressants, need to be assessed individually; go to the vaccination clinic, explain the situation, and decide there. For the first hepatitis B dose, see Item 2. Self-paid vaccines outside the immunization program charge a separate vaccine fee and vaccination service fee; this has nothing to do with the free vaccines this item is about.
Sources
全国人大常委会 (2019). 疫苗管理法(第四十八、四十九条). http://ynswsjkw.yn.gov.cn/html/2019/faguiguizhangxin_0731/6509.html(云南省卫生健康委员会转载);国家疾病预防控制局、国家卫生健康委 (2026). 《国家免疫规划疫苗儿童免疫程序及说明(2026 年版)》解读问答. https://www.ndcpa.gov.cn/jbkzzx/c100013/common/content/content_2073002930292035584.html
Section 20, Item 4·Outcome  Lifespan

Feed only breast milk for the first 6 months, not even water; from 6 months add complementary foods and keep breastfeeding

Value for cost Standard
In plain terms

Start breastfeeding within the first hour after birth. For the first 6 months give only breast milk, not even water. Once the baby is 6 months old, add complementary foods, with iron-rich animal foods every day, and keep breastfeeding to age 2 or longer. If there isn't enough breast milk or you can't breastfeed, use formula, and don't blame yourself. What you feed matters far less for the child's safety than sleep position.

Cost
No money, and it saves the cost of formula. What it costs is time: feeding takes up a good part of every day. The hard part is keeping it up without stopping during the first 6 months No money Time every day Lots of willpower Benefit size medium
Benefit
The World Health Organization recommends “initiating breastfeeding within the first hour after birth.” For the first 6 months, “exclusive breastfeeding, that is, providing no other food or liquid, including water.” Then “from 6 months of age, introduce safe and adequate complementary foods while continuing breastfeeding to 2 years of age or beyond.” The National Health Commission's service guideline also promotes exclusive breastfeeding from 0 to 6 months. That guideline further requires that from 6 months of age “the daily complementary foods must include iron-rich animal foods”
Evidence grade
A
Notes
If there isn't enough breast milk, or your health does not allow breastfeeding, use formula. The gap between breast milk and formula is much smaller than in the safe sleep item. How often to give complementary foods: 1 to 2 times a day at 6 to 8 months, 2 to 3 times a day at 9 to 12 months. What the baby eats each day should cover at least four of the seven food groups. For whether to keep away from peanuts when the baby has severe eczema or an egg allergy, see Item 12 of this section (don't avoid peanuts). If the mother is vegetarian or wants to raise the baby vegetarian, see Item 14 of this section (if vegetarian, take vitamin B12 every day).
Sources
World Health Organization. Breastfeeding. https://www.who.int/health-topics/breastfeeding;国家卫生健康委办公厅 (2024). 婴幼儿营养喂养评估服务指南(试行)(国卫办妇幼函〔2024〕452 号). https://www.gov.cn/zhengce/zhengceku/202502/content_7002872.htm
Section 20, Item 5·Outcome  Lifespan

Make formula with water at 70 ℃ or above, let it cool before feeding, and pour out what's left

Value for cost High
In plain terms

Powdered formula is not sterile and may carry a bacterium called Cronobacter sakazakii. Once a newborn is infected, the reported death rate is between four and eight in ten. When mixing, first pour the hot water into the bottle, wait until the water has cooled to about 73.8 ℃, then add the powder. At that point the milk is still above 70 ℃, which can kill this bacterium down to less than one hundred-thousandth of what was there. Let it cool before feeding, and pour out what's left.

Cost
No money. Wait a few extra minutes each time for the milk to cool. The hard part is waiting for the water temperature to come down before mixing, even when the baby is crying with hunger No money Done in passing Some willpower Benefit size large
Benefit
Powdered formula is not sterile and may carry Cronobacter sakazakii. The death rate in newborns after infection is reported as 40% to 80%. Experimental research shows that if you first pour hot water into the bottle and wait for the water to cool to about 73.8 ℃ before adding the powder, in the great majority of cases the milk is still above 70 ℃. This reduces the bacterium by more than 5 log units, to less than one hundred-thousandth of what was there
Evidence grade
A
Notes
The 70 ℃ threshold comes from public health guidelines. In the words of Beary and colleagues, “public health guidelines for caregivers of high-risk infants recommend reconstituting powdered infant formula with water heated to at least 70 ℃ (158 ℉) to inactivate microorganisms.” Premature babies, babies with low body weight and babies under 2 months old are at the highest risk. Don't mix formula with water that has sat in a thermos for a day. And don't leave mixed formula at room temperature to feed at the next meal
Sources
Beary MA, Daly SE, Baker J, Snyder AB (2025). Assessing Hot Water Reconstitution Instructions and Labeling of Powdered Infant Formula to Ensure Cronobacter spp. Reduction. Journal of Food Protection, 88(9), 100571. https://doi.org/10.1016/j.jfp.2025.100571;Sima WG, Legesse T, Girma S, et al. (2025). Emerging microbial risks: Cronobacter sakazakii in powdered infant formula for infants under six months of age in Ethiopia. BMC Microbiology, 26, 307. https://doi.org/10.1186/s12866-025-04380-y;World Health Organization & FAO (2007). Safe preparation, storage and handling of powdered infant formula: guidelines. https://www.who.int/publications/i/item/9789241595414
Section 20, Item 6·Outcome  Lifespan

Don't give honey to a baby under 1

Value for cost High
In plain terms

If your child is under 1, don't feed them honey. Honey water, honey stirred into complementary food and pastries containing honey all count. Honey may carry the bacteria that cause botulism. The bacteria in an adult's gut can keep it in check; a baby's cannot. The same reasoning applies to homemade pickles and fermented foods.

Cost
No money No money Done in passing No willpower Benefit size medium
Benefit
The US CDC says “do not feed honey to children younger than 1 year old,” because “honey can contain bacteria that cause botulism.” The gut bacteria of adults can keep these spores (the dormant state of this bacterium) in check; babies' cannot
Evidence grade
A
Notes
What must not be fed includes honey water, complementary food mixed with honey and pastries containing honey. By the same reasoning, don't give babies homemade pickles and fermented foods either
Sources
US CDC. Preventing Botulism. https://www.cdc.gov/botulism/prevention/index.html
Section 20, Item 7·Outcome  Lifespan

Be sure the baby gets the vitamin K shot at birth

Value for cost Very high
In plain terms

Newborns have very little vitamin K stored in their bodies. Without a supplement they may bleed, and the late-appearing kind is often bleeding inside the brain. In places where this shot is not given widely, 478 of every 100,000 newborns have this kind of bleeding. Getting the shot is estimated to cut that by more than 78%. Regular hospitals in China give it routinely; if the baby is born at home or at an unregulated facility, ask whether it has been given.

Cost
0 yuan to a few dozen yuan. This cost is usually already included in the hospital fees for giving birth; you don't pay it separately No money Done in passing No willpower Benefit size large
Benefit
Newborns have very little vitamin K stored in their bodies. Without supplementation, vitamin K deficiency bleeding can occur, and the late-appearing form often presents as intracranial hemorrhage (bleeding inside the brain). A Belgian consensus recommends “a single intramuscular injection of 1 or 2 mg of vitamin K at birth.” In areas without systematic prophylaxis, the incidence of vitamin K deficiency bleeding is 478 per 100,000, a figure from 42,000 newborns in Tashkent. The authors estimate that prophylaxis can reduce the incidence by “more than 78.5%”
Evidence grade
B
Notes
If you give birth at a regular hospital in China, the hospital gives this shot routinely, so you don't need to worry about it. If the baby is born at home or at an unregulated facility, make a point of confirming it. The oral form works less well than the shot; the shot meant here is an injection into the muscle
Sources
Fiesack S, Smits A, Rayyan M, et al. (2021). Nutrients, 13(11), 4109. https://doi.org/10.3390/nu13114109;Tursunov D, Yoshida Y, Yrysov K, et al. (2018). Nagoya Journal of Medical Science, 80(1), 11. https://doi.org/10.18999/nagjms.80.1.11
Section 20, Item 8·Outcome  Lifespan

If a baby under 3 months has a temperature that reaches 38 ℃, go straight to the hospital; don't watch and wait at home

Value for cost High
In plain terms

If the baby is under 3 months old and their temperature reaches 38 ℃, go straight to the hospital. Don't watch them at home, and don't give fever medicine first and then wait and see. At this age, even a serious bacterial infection may show up only as a fever. So “they seem in fairly good spirits” cannot be a reason to wait at home. For a baby less than 8 days old, not even the guideline covers them, so go right away all the more.

Cost
A few hundred yuan for registration plus tests A little money Done in passing No willpower Benefit size large
Benefit
The American Academy of Pediatrics has a dedicated guideline for full-term infants 8 to 60 days old who appear well. The guideline defines fever as “a temperature ≥38.0 ℃.” It divides infants into three bands, 8 to 21 days old, 22 to 28 days old and 29 to 60 days old, and gives a management pathway for each. Infants under 8 days old are not even within the scope of this guideline, which means that at this stage seeking care immediately matters all the more
Evidence grade
A
Notes
At this age, a baby with a serious bacterial infection may show nothing but a fever. So seeming “in fairly good spirits” cannot be a reason to watch them at home. And don't give fever medicine yourself first and then wait and see
Sources
Pantell RH, Roberts KB, Adams WG, et al. (2021). Evaluation and Management of Well-Appearing Febrile Infants 8 to 60 Days Old. Pediatrics, 148(2), e2021052228. https://doi.org/10.1542/peds.2021-052228
Section 20, Item 9·Outcome  Lifespan

Never shake a baby, no matter how tired or angry you are

Value for cost High
In plain terms

A baby's head is big and the neck has no strength. Shaking hard can make the baby bleed inside the brain and inside the eyes; it can kill them, or leave them disabled for life. Gentle rocking to get them to sleep doesn't count; what is dangerous is violent, out-of-control shaking. When you are close to losing your temper, put the baby back in the crib and walk away for a few minutes; letting them cry for a while is safer than holding them and shaking.

Cost
No money. The hard part is stopping your hands when you are too tired or too angry No money Done in passing Lots of willpower Benefit size large
Benefit
A baby's head is large in proportion and the neck muscles are weak. Violent shaking causes intracranial hemorrhage and retinal hemorrhage (bleeding inside the brain and inside the eyes), which can be fatal or leave lifelong disability. Gentle rocking to get a baby to sleep does not count; what is dangerous is violent, out-of-control shaking. In medicine, this kind of injury caused by shaking or impact is called “abusive head trauma.” It is the leading cause of death from head trauma in children under 2. In the United States from 1999 to 2014, it caused the deaths of nearly 2250 children under 5
Evidence grade
B
Notes
If you really reach the moment when you are about to lose control, first put the baby back in the crib and walk away for a few minutes. Letting them cry for a while is much safer than holding them and shaking. People caring for a baby alone and people who have been short of sleep for a long time most need to remember this. For how to handle your own emotions, see Section 3
Sources
Spies EL, Klevens J (2016). Fatal Abusive Head Trauma Among Children Aged <5 Years — United States, 1999–2014. MMWR 65(20):505-509. https://doi.org/10.15585/mmwr.mm6520a1;Choudhary AK 等 (2018). Consensus statement on abusive head trauma in infants and young children. Pediatric Radiology 48(8):1048-1065. https://doi.org/10.1007/s00247-018-4149-1
Section 20, Item 10·Outcome  Money

Choose diapers not by brand but by three things: whether they fit, whether you change them often enough, and whether they have been named in a spot-check notice

Value for cost Standard
In plain terms

No official body has ever ranked “which brand is best.” Only two things can be checked: the product quality spot-check notices of the State Administration for Market Regulation, and regulators' investigations of specific incidents. Expensive does not mean safe, and imported does not mean up to standard. Buy a small pack first and try it for a week, see whether the baby gets diaper rash or marks from tightness, and stock up only if they suit.

Cost
Anywhere from two or three hundred to over a thousand yuan a month, depending on the tier you use A little money Done in passing No willpower Benefit size medium
Benefit
No official body has ever published a ranking of “which brand is best,” so this book makes no brand recommendations. Only two kinds of information can be checked. One is the product quality spot-check notices of the State Administration for Market Regulation. The other is regulators' investigations of specific incidents. After the “formamide in infant diapers issue” drew attention in June 2026, the State Administration for Market Regulation led the setting up of a joint investigation team to look into it
Evidence grade
C
Notes
When the joint investigation team was set up, it said only that “relevant information will be published in a timely manner.” TODO (to be verified: the investigation's findings. As of September 30, 2026, no conclusion on diapers had been found on the State Administration for Market Regulation's website or in the national supervisory spot-check notices of recent years). How to buy in practice: expensive does not mean safe, and imported does not mean up to standard. Buy a small pack first and try it for a week, see whether the baby gets diaper rash or marks from tightness, and stock up only if they suit. Diaper rash is mainly caused by not changing often enough and poor breathability; it has less to do with the brand than people imagine. For how to look up spot-check notices, see Section 5
Sources
市场监管总局 (2026-06-22). 市场监管总局牵头成立联合调查组核查「婴幼儿纸尿裤甲酰胺问题」:「针对媒体反映的"婴幼儿纸尿裤甲酰胺问题",市场监管总局、工业和信息化部、国家卫生健康委、国家疾控局高度重视,成立联合调查组,核查婴幼儿纸尿裤甲酰胺有关问题,并依法依规处理。有关情况将及时公布。」. https://www.samr.gov.cn/xw/zj/art/2026/art_78c0425db7604b27bd7a3f36ba319975.html;中国政府网转载. https://www.gov.cn/zhengce/202606/content_7072931.htm
Section 20, Item 11·Outcome  Money

For big items, consider borrowing, then buying secondhand, then buying new, in that order; don't buy everything at once

Value for cost Standard
In plain terms

Strollers, cribs, swaddle blankets and toys are all used only for a short time, and there are plenty secondhand. First ask to borrow; if you can't borrow, buy secondhand; only if that doesn't work, buy new. This usually saves a thousand yuan or more. Don't buy car seats or mattresses secondhand; the damage a car seat takes in a crash cannot be seen with the eye. For big expenses such as postpartum confinement centers and early-education classes, cool down for 24 hours before deciding.

Cost
No extra spending; the savings are usually counted in thousands of yuan. The hard part is holding back from buying everything at once A little money Done in passing Some willpower Benefit size medium
Benefit
Strollers, cribs, swaddle blankets and toys all have a very short period of use, and on the secondhand market supply far exceeds demand. The only two things you really can't skimp on, and that are not advised secondhand, are car seats and mattresses. Structural damage to a car seat after a crash cannot be seen with the naked eye
Evidence grade
C
Notes
This book neither recommends nor rejects postpartum confinement centers, early-education classes or baby swimming centers. But they are all large sums you can choose to spend or not, and the 24-hour cooling-off period described in Section 5 applies
Sources
作者经验,无直接文献;安全座椅的证据见第 1 节,冲动消费见第 5 节
Section 20, Item 12·Outcome  Lifespan

If your child has severe eczema or an egg allergy, don't avoid peanuts: add them early under a doctor's guidance, but never give whole peanuts

Value for cost High
In plain terms

Among babies with severe eczema or an egg allergy who ate peanuts regularly starting at 4 to 11 months, only 1.9% had a peanut allergy at age 5, compared with 13.7% of those who avoided peanuts completely. For children who already had some reaction on a skin test, it was 10.6% among those who ate peanuts and 35.3% among those who avoided them. Take the child to a doctor before you start. Never give whole peanuts; they can choke the airway.

Cost
A jar of peanut butter costs a few dozen yuan. Feeding it a few times a week is easy to fit in. Before starting, take the child to see a doctor once for an assessment. A little money Done in passing No willpower Benefit size large
Benefit
The UK LEAP randomized trial. 640 infants were enrolled; the condition was having severe eczema, an egg allergy or both. At enrollment they were 4 to 11 months old. They were randomly split into two groups, one eating peanut products regularly and the other avoiding them completely, and peanut allergy rates were measured at 60 months of age. Among the 530 who had a negative peanut skin test at enrollment, 13.7% of the avoidance group were allergic versus 1.9% of the eating group (P<0.001). Among the 98 whose skin test was already weakly positive at enrollment, it was 35.3% in the avoidance group and 10.6% in the eating group (P=0.004). There was no difference in serious adverse events between the two groups.
Evidence grade
A
Notes
The only acceptable forms are thinned peanut butter or peanut powder mixed into complementary food; never give whole peanuts. The National Health Commission's core feeding messages state clearly: “Whole peanuts, nuts, jelly and similar foods are easily inhaled into the airway and cause choking; infants and young children should avoid eating them.” For what to do if the child chokes, see Section 13, Item 26 (someone choking and unable to speak). This applies only to high-risk children: those with severe eczema, or those already allergic to egg. Before starting you must see a doctor for an assessment; don't try it yourself at home: in the LEAP trial, every child was given a skin test before enrollment, and children whose skin-test reaction was larger than 4 mm were excluded from the trial and not given peanuts. The evidence for ordinary children is much weaker. In another trial of 1162 ordinary breastfed infants, counted by assigned group, food allergy was 5.6% in the early-introduction group and 7.1% in the standard group, a difference that was not significant (P=0.32); it was significant only among the children who actually did it (2.4% vs 7.3%). That way of counting easily overstates the effect; the authors themselves said that counting by assigned group did not demonstrate efficacy, but also said that early introduction was safe. China's official feeding documents currently say nothing on “whether allergenic foods should be introduced early or avoided,” so this item is written from international trial evidence. Mind the timing as well: LEAP started from 4 months of age, whereas in China complementary foods start once the baby is 6 months old; see Item 4 of this section (only breast milk for the first 6 months). For high-risk children, follow the doctor on what age in months to start at and how to start.
Sources
Du Toit G, Roberts G, Sayre PH, 等 (2015). Randomized trial of peanut consumption in infants at risk for peanut allergy. New England Journal of Medicine, 372(9), 803-813. https://doi.org/10.1056/NEJMoa1414850;国家卫生健康委办公厅 (2020). 婴幼儿喂养健康教育核心信息. https://www.gov.cn/zhengce/zhengceku/2020-08/01/content_5531915.htm;Perkin MR 等 (2016). Randomized Trial of Introduction of Allergenic Foods in Breast-Fed Infants. New England Journal of Medicine, 374(18), 1733-1743. https://doi.org/10.1056/NEJMoa1514210(备注里那项一般婴儿试验 EAT)
Section 20, Item 13·Outcome  Lifespan

Watch for these signs of newborn jaundice: yellow within 24 hours of birth, getting more and more yellow, can't be woken and won't feed, pale stools; go to the hospital the same day

Value for cost High
In plain terms

More than eight in ten newborns turn a little yellow, and in most it fades on its own. If the baby turns yellow less than 24 hours after birth, or keeps getting more yellow, is sleepier than usual and can't be woken, won't feed, or is floppy or stiff, go to the hospital the same day. Pale stools may mean biliary atresia, and also need to be checked as soon as possible. Bilirubin that is too high can damage the brain and leave a lifelong disability.

Cost
Registration plus a bilirubin test, within a few hundred yuan. If blue-light treatment is needed, it is usually about two days in the hospital. The hard part is making the trip even when the baby looks fine A little money Done in passing No willpower Benefit size large
Benefit
The American Academy of Pediatrics' 2022 guideline says “more than 80% of newborns will have some degree of jaundice.” Bilirubin that is too high can cause acute bilirubin encephalopathy and kernicterus. The guideline calls kernicterus “a permanent, disabling neurologic condition.” Its signs include cerebral palsy in which the hands and feet writhe involuntarily, inability to look upward, poorly developed baby-tooth enamel and hearing loss. The guideline lists “jaundice appearing within 24 hours after birth” as a risk factor for developing severe jaundice. The UK National Health Service (NHS) advises parents in two tiers. The first tier calls for phoning the emergency number or going straight to the emergency department. This tier is when the baby has jaundice and at the same time is sleepier than usual or hard to wake, won't feed, is floppy or stiff, or has twitching. A baby who has jaundice when less than 24 hours old also falls in this tier. The second tier calls for getting a doctor's appointment as soon as possible. This tier is when, more than 24 hours after birth, the jaundice is not getting better or is getting worse, the urine is dark yellow or brown, or the stools are a pale cream color. Globally, an estimated 480,000 newborns in 2010 had Rh hemolytic disease (caused by a blood-type mismatch between mother and baby) or extreme hyperbilirubinemia. Of these babies, 24% died and 13% developed kernicterus. Of the babies who survived kernicterus, more than 83% were left with one or more impairments. Pale stools may mean biliary atresia; for this disease the Kasai operation has to be done within 60 days for the outlook to be clearly better. From 2004, Taiwan printed a stool color card in every newborn's child health booklet. The share operated on within 60 days rose from 60% in 2004 to 74.3% in 2005. In another nationwide Taiwanese study, after the color card was introduced, the death rate of children with biliary atresia fell from 26.2% to 15.9%. This is a before-and-after comparison, not a trial that split children into groups
Evidence grade
B
Notes
Blue-light treatment (phototherapy) shines a special light on the baby's skin to turn bilirubin into a form that is easier to get rid of. Don't substitute sunbathing at home: the American Academy of Pediatrics says sunlight is hard to make both safe and free of sunburn, so it does not recommend using it as treatment. And don't give water or glucose water to bring the jaundice down; the guideline also explicitly does not recommend this. Judging the depth of yellow by eye cannot accurately estimate how high the bilirubin is. The UK NICE guideline states not to rely on the eye alone; if in doubt, get a test. Babies born before 38 weeks, babies whose older brother or sister had blue-light treatment, and babies not getting enough breast milk are more likely to become severely jaundiced. Follow-up goes by the National Basic Public Health Service Standards (国家基本公共卫生服务规范): within 1 week after discharge, a health worker makes a home visit. At 28 to 30 days after birth, there is a follow-up at the community health center or township health center. Jaundice is checked at both. If the doctor set a separate bilirubin recheck at discharge, go at the scheduled time. If a full-term baby has been yellow for more than 14 days, or a premature baby for more than 21 days, the NICE guideline calls for a conjugated bilirubin test and a check of whether the stools are pale. Jaundice itself does not delay vaccines; see Item 3 of this section (vaccines). For newborn screening, see Section 27, Item 13 (heel-prick blood screening).
Sources
Kemper AR, Newman TB, Slaughter JL, et al. (2022). Clinical Practice Guideline Revision: Management of Hyperbilirubinemia in the Newborn Infant 35 or More Weeks of Gestation. Pediatrics, 150(3), e2022058859. https://doi.org/10.1542/peds.2022-058859;NHS. Jaundice in babies(2026-03-24 审阅). https://www.nhs.uk/conditions/jaundice-newborn/;NICE (2010, 2023 修订). Jaundice in newborn babies under 28 days (CG98), 1.2.6、1.7.1. https://www.nice.org.uk/guidance/cg98/chapter/Recommendations;Bhutani VK, Zipursky A, Blencowe H, et al. (2013). Neonatal hyperbilirubinemia and Rhesus disease of the newborn: incidence and impairment estimates for 2010 at regional and global levels. Pediatric Research, 74(Suppl 1), 86-100. https://doi.org/10.1038/pr.2013.208;Hsiao CH, Chang MH, Chen HL, et al. (2008). Universal screening for biliary atresia using an infant stool color card in Taiwan. Hepatology, 47(4), 1233-1240. https://doi.org/10.1002/hep.22182;Lee M, Chen SC, Yang HY, et al. (2016). Infant Stool Color Card Screening Helps Reduce the Hospitalization Rate and Mortality of Biliary Atresia: A 14-Year Nationwide Cohort Study in Taiwan. Medicine, 95(12), e3166. https://doi.org/10.1097/MD.0000000000003166;国家卫生计生委 (2017). 国家基本公共卫生服务规范(第三版),0~6 岁儿童健康管理服务规范. https://www.nhc.gov.cn/ewebeditor/uploadfile/2017/04/20170417104506514.pdf
Section 20, Item 14·Outcome  Lifespan

If you eat vegetarian while pregnant or breastfeeding, take vitamin B12 every day; the baby's complementary foods should include animal foods, and if you insist on fully vegan, see a doctor first

Contested Value for cost Standard
In plain terms

Vitamin B12 is found almost only in meat, eggs and dairy. If the mother eats fully vegan and takes no supplement, her milk will be short of it, and problems in the baby mostly appear at 4 to 8 months of age: the baby doesn't grow and falls behind in development, and if it drags on, the nerve damage may not be reversible. The baby's complementary foods should include animal foods every day.

Cost
A bottle of vitamin B12 supplement costs a few dozen yuan; take one pill a day. Adding eggs, meat and fish to the baby's complementary foods doesn't cost much. The hard part is changing your mind when the whole family is convinced that eating vegetarian is healthier A little money Done in passing Some willpower Benefit size medium
Benefit
In 2003 the US CDC reported on two children. Both had been breastfed by vegetarian mothers, both were B12 deficient, and both failed to grow and fell behind in development. The first child's mother had eaten fully vegan for 7 years. The child was hospitalized at 15 months, found to have severe anemia, and a brain MRI showed atrophy of the whole brain. After B12 was given the child improved, but at 32 months of age speech and language were still delayed. The report says the most common cause of B12 deficiency in infants and young children is deficiency in the mother's diet. In breastfed babies it usually shows up at 4 to 8 months of age. When the deficiency lasts a long time, some children are left with irreversible nerve damage, its severity depending on how severe the deficiency was and how long it lasted. The only reliable sources that do not depend on fortification are animal foods: meat, dairy products and eggs. Most of the B12 that occurs naturally in plants cannot be used by the human body. Cereals, soy milk and nutritional yeast with added B12 can serve as steady sources. The report asks vegetarians, especially women who are pregnant or breastfeeding, to find out how much B12 is in what they eat, or to consult a nutrition professional. The 2017 complementary feeding position paper of the European Society for Paediatric Gastroenterology, Hepatology and Nutrition states that all infants should receive iron-rich complementary foods, including meat or iron-fortified foods. A vegan diet should be followed only under appropriate supervision by a doctor or dietitian, and parents should understand the serious consequences of not following the advice on supplements. The National Health Commission's 2020 core feeding messages require that complementary foods include no fewer than 4 kinds of food every day, including at least one animal food, one vegetable and one grain or tuber food
Evidence grade
B
Notes
Contested: the US Academy of Nutrition and Dietetics' 2016 position is that appropriately planned vegetarian and vegan diets are suitable for all stages of life, including pregnancy, breastfeeding, infancy and childhood. But it also states that vegans need a reliable source of B12, such as fortified foods or supplements. The two sides disagree on whether infants can be fed a vegan diet; they do not disagree that “B12 must be supplemented.” A vegetarian diet that includes eggs and dairy carries lower risk, but people who rarely eat eggs or dairy can become deficient all the same. The mother of the second child in the report had been vegetarian for 20 years and almost never touched meat, fish or dairy products. The early symptoms of B12 deficiency are not distinctive, and the US CDC says anemia measures are not suitable for screening. If the child is growing slowly or not keeping up in development, tell the doctor on your own initiative that the family eats vegetarian, and let the doctor decide what to test. Don't refuse the treatment the doctor gives because you believe in folk remedies; see Section 16, Item 4 (don't stop proper treatment to try folk remedies). For how to add complementary foods, see Item 4 of this section (add complementary foods from 6 months); for folic acid during pregnancy, see Section 27, Item 1 (take 0.4 mg of folic acid every day).
Sources
Centers for Disease Control and Prevention (2003). Neurologic impairment in children associated with maternal dietary deficiency of cobalamin—Georgia, 2001. MMWR, 52(4), 61-64. https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5204a1.htm;Fewtrell M, Bronsky J, Campoy C, et al. (2017). Complementary Feeding: A Position Paper by the European Society for Paediatric Gastroenterology, Hepatology, and Nutrition (ESPGHAN) Committee on Nutrition. Journal of Pediatric Gastroenterology and Nutrition, 64(1), 119-132. https://doi.org/10.1097/MPG.0000000000001454;国家卫生健康委办公厅 (2020). 婴幼儿喂养健康教育核心信息. https://www.gov.cn/zhengce/zhengceku/2020-08/01/content_5531915.htm;Melina V, Craig W, Levin S (2016). Position of the Academy of Nutrition and Dietetics: Vegetarian Diets. Journal of the Academy of Nutrition and Dietetics, 116(12), 1970-1980. https://doi.org/10.1016/j.jand.2016.09.025(备注里的反方)