How to Support Your Child’s Immune Health and Reduce Infections at School
Returning to school means children spend more time in classrooms and shared spaces and have closer contact with classmates. These conditions can make it easier for some respiratory and gastrointestinal infections to spread. [1] [2]
Keeping children healthy, however, is not about finding one vitamin, food or product that can instantly “boost” immunity. A more useful approach is to support normal immune function through healthy daily habits while using proven infection-prevention measures such as recommended vaccinations, good hand hygiene and staying home when sick. [3] [4]
This guide explains what families can realistically do to support children's immune health and reduce the spread of infections during the school year—and which popular “immune-boosting” approaches most healthy children do not need.
For a broader school-health plan covering nutrition, sleep, activity and emotional preparation, see our Back-to-School Child Health Guide .
Why do infections spread more easily at school?
Schools are important environments for learning and social development, but they also bring many children together in shared classrooms and spaces. CDC notes that infections may spread through close contact, shared objects and surfaces, close play and factors such as hygiene practices and ventilation. [2]
Saudi Ministry of Health guidance also notes that several respiratory, gastrointestinal and skin infections may become more common during the school season. [1]
It is not possible to prevent every illness, but consistent everyday actions can reduce the spread of many common infections.
Can you really “boost” a child’s immune system?
The phrase “boost children's immunity” is commonly used, but it can suggest that one food, drink or supplement can quickly make the immune system stronger.
The immune system is far more complex. Normal immune function depends on overall health and adequate nutrition, while vaccines train the adaptive immune system to recognize and respond to specific pathogens. [3] [5]
The American Academy of Pediatrics states that most healthy children who eat a varied diet do not need extra vitamin or mineral supplements to “boost” immunity. Nutritious food, sufficient sleep, regular physical activity and recommended vaccines are more useful foundations. [3]
1. Review your child’s vaccinations
Vaccination is one of the most effective ways to protect children from specific vaccine-preventable infectious diseases.
The Saudi Ministry of Health states that the national childhood immunization schedule is designed to protect children and the wider community from diseases targeted by the immunization program. [5]
Before and during the school year, review your child's immunization record and make sure age-appropriate vaccines are up to date according to the Saudi National Immunization Schedule.
The American Academy of Pediatrics also highlights vaccination as an important part of back-to-school preventive care. [6]
2. Make handwashing a routine
Handwashing is one of the most useful everyday infection-prevention habits in schools. CDC notes that school hand-hygiene programs can reduce gastrointestinal and respiratory illness and missed school days. [4]
Children should be taught to wash their hands with soap and water for at least 20 seconds. [4]
Important times to wash hands
- After using the bathroom.
- Before eating.
- After coughing, sneezing or blowing the nose.
- After activities that leave the hands dirty.
- When returning home if the hands need cleaning.
When soap and water are not readily available, an alcohol-based hand sanitizer containing at least 60% alcohol may be used, with appropriate supervision for younger children. [4]
Soap and water remain preferable when hands are visibly dirty and after using the toilet. [4]
3. Teach proper cough and sneeze etiquette
CDC recommends teaching and reinforcing respiratory etiquette to reduce the spread of respiratory viruses in schools. [2]
- Cover the mouth and nose with a tissue when coughing or sneezing.
- Dispose of used tissues appropriately.
- If a tissue is unavailable, cough or sneeze into the inside of the elbow rather than the hands.
- Clean hands afterward when needed.
Practicing these habits at home can make it easier for children to use them independently at school.
4. Focus on balanced nutrition rather than “immune foods”
The immune system requires many nutrients to function normally. The U.S. National Institutes of Health notes that adequate intake of several vitamins and minerals is important for proper immune function and that clinical deficiencies can weaken immunity. [7]
This does not mean that large amounts of one vitamin or one “superfood” can prevent school infections.
A varied eating pattern that includes fruits, vegetables, grains, protein foods and dairy or appropriate alternatives is a better foundation than relying on products marketed as immunity boosters. [3]
Read more: Healthy Nutrition for School-Aged Children: A Practical Guide for Ages 6–12 .
5. Protect your child’s sleep
Adequate sleep is one of the basic health habits the American Academy of Pediatrics recommends for supporting children's overall and immune health, alongside healthy nutrition, physical activity and vaccination. [3]
Children aged 6–12 years generally need 9–12 hours of sleep per 24 hours on a regular basis.
Read more: How Much Sleep Do School-Aged Children Need? A Practical Guide for School Nights .
6. Keep children physically active
The American Academy of Pediatrics includes regular physical activity among the basic habits that support children's overall health and immune function. [3]
Encourage age-appropriate movement, play and physical activity rather than allowing the entire day to become a cycle of school, homework and screens.
7. Avoid sharing personal items
Saudi Ministry of Health guidance recommends avoiding the sharing of personal items as one of the measures families can teach children to help reduce infection transmission at school. [1]
Items children should generally keep for their own use include:
- Water bottles.
- Eating utensils.
- Personal towels and tissues.
- Items that come into contact with the mouth or face.
This does not mean children cannot share ordinary educational materials. The emphasis is on personal items that may transfer saliva or other secretions.
What should be in a simple school health kit?
Children do not need a backpack full of preventive products. A few practical items are usually enough:
| Item | Why It May Help |
|---|---|
| Personal water bottle | Supports hydration and avoids sharing bottles. |
| Tissues | Useful for coughs, sneezes and blowing the nose. |
| Personal eating utensils | Reduces the need to share utensils. |
| Hand sanitizer when appropriate | Can be used when soap and water are unavailable, if permitted by the school and appropriate for the child's age. |
Do children need vitamins or supplements to boost immunity?
For most healthy children who eat a balanced and varied diet, extra vitamin or mineral supplements are not routinely needed simply to “boost immunity.” [3]
The American Academy of Pediatrics notes that supplements may be appropriate in specific situations, such as a diagnosed nutrient deficiency, a very restricted diet or a medical condition that increases the risk of deficiency. [3]
More is not necessarily better. High doses of some vitamins can be harmful, so supplements should be discussed with a healthcare professional before they are given to a child. [3]
Can vitamin C supplements prevent colds in children?
Vitamin C is an important nutrient, but the American Academy of Pediatrics notes that there is no evidence that vitamin C supplements prevent children from catching a cold. [3]
When should a child stay home from school?
Sending a sick child to school can make the day difficult for the child and may increase the chance of spreading infection to others.
CDC guidance recommends staying home when symptoms may prevent normal participation at school or may indicate a meaningful risk of spreading infection, including: [8]
- Fever.
- Repeated vomiting.
- Significant or unusual diarrhea.
- Respiratory symptoms that are worsening or not improving.
- Certain draining skin sores that cannot be properly covered.
Return-to-school rules depend on the illness, local health guidance and school policy. Families should follow local and school instructions and consult a healthcare professional when uncertain about a child's condition or return date.
A simple daily infection-prevention plan
| When | What to Do |
|---|---|
| Before school | Check that your child feels well, has eaten and has their personal water bottle and necessary items. |
| During school | Wash hands at key times, use cough and sneeze etiquette and avoid sharing personal items. |
| After school | Clean hands when needed, eat and drink appropriately and maintain a healthy routine with activity and enough sleep. |
| If symptoms appear | Assess how the child feels, keep them home when indicated by school and health guidance, and seek medical advice when needed. |
Frequently asked questions about children's immunity and school infections
How can I strengthen my child's immunity before school?
There is no single product that instantly strengthens immunity. Focus on recommended vaccinations, balanced nutrition, adequate sleep, regular physical activity, hand hygiene and keeping children home when they are genuinely ill. [1] [3]
Does my child need immune-boosting supplements?
Most healthy children who eat a varied diet do not need extra supplements for this purpose. Supplements may be recommended when a child has a diagnosed deficiency, restricted diet or specific health condition. [3]
What is the best way to prevent infections at school?
No single measure prevents every infection. A layered approach—including vaccination, handwashing, respiratory etiquette, avoiding the sharing of personal items and staying home when sick—is more effective. [1] [2]
Does hand sanitizer replace handwashing?
No. Soap and water are preferred in many situations, particularly when hands are visibly dirty and after using the toilet. When soap and water are unavailable, sanitizer containing at least 60% alcohol can be used appropriately. [4]
Should a child with a fever go to school?
CDC guidance recommends that children with fever stay home, while families should also follow local health guidance and their school's return-to-school policy. [8]
Healthy school habits are more useful than an “immune booster”
Supporting a child's health during the school year does not require a long list of products or supplements. The most useful foundations are often the simplest: up-to-date vaccinations, a varied diet, adequate sleep, regular movement, good hand hygiene, respiratory etiquette and avoiding the sharing of personal items.
The goal is to turn these steps into everyday habits rather than temporary rules used only during the first weeks of school.
If your child has a chronic health condition, a known immune disorder or recurrent infections that concern you, speak with a healthcare professional for advice tailored to your child's health.
Sources and References
- Saudi Ministry of Health. How to Protect Students from the Spread of Viruses .
- Centers for Disease Control and Prevention (CDC). Everyday Actions for Schools to Prevent and Control the Spread of Infections .
- American Academy of Pediatrics (AAP) – HealthyChildren.org. Nutritional Supplements, Vitamins & Boosting Your Child’s Immunity . Updated April 2026.
- Centers for Disease Control and Prevention (CDC). About Hand Hygiene in Schools and Early Care and Education Settings .
- Saudi Ministry of Health. National Childhood Immunization Schedule .
- American Academy of Pediatrics (AAP) – HealthyChildren.org. Back to School, Back to the Doctor: How Annual Checkups Support Your Child’s Health . Updated August 2026.
- National Institutes of Health (NIH) – Office of Dietary Supplements. Dietary Supplements for Immune Function and Infectious Diseases .
- Centers for Disease Control and Prevention (CDC). When Students or Staff Are Sick .
This content is intended for health education and does not replace individual medical assessment or professional medical advice when needed.