Most Common Communicable Disease Your Child Can Pick Up At School

8 min read
Cold & Cough
Most Common Communicable Disease Your Child Can Pick Up At School

Quick Answer: When kids start school, they inevitably catch illnesses - it’s how they build immunity. The most common are colds (6-8 per year!), stomach bugs, pink eye, ear infections, and hand-foot-mouth disease. Most are viral and resolve with rest and fluids. Your job: know when to keep them home, when to see a doctor, and how to prevent spread. Good news - they get sick less often as they get older!


Why School = More Sick Days

Schools are germ-sharing environments:

  • Close contact with many children
  • Shared toys, books, surfaces
  • Common bathrooms
  • Young immune systems still learning
  • Kids touch everything (then their faces!)

The Good News

Getting sick actually helps!

  • Each illness builds immunity
  • By school age, frequency decreases
  • Most illnesses are mild and self-limiting

Top 10 School Illnesses (Quick Reference)

IllnessMain SymptomsDurationContagious?
Common ColdRunny nose, cough7-10 daysVery
Stomach BugVomiting, diarrhea1-3 daysVery
Hand-Foot-MouthMouth sores, rash7-10 daysVery
Pink EyeRed, itchy eye, discharge3-7 daysYes (bacterial)
Ear InfectionEar pain, fever3-5 daysNot directly
FluHigh fever, body aches5-7 daysVery
Strep ThroatSevere sore throat, feverUntil treatedYes
Head LiceItchy scalp, nitsUntil treatedContact required
ImpetigoCrusty soresUntil treatedYes
RingwormRed ring-shaped rashUntil treatedYes

Managing the Big Five

1. The Common Cold

What you’ll see:

  • Runny or stuffy nose
  • Cough
  • Mild fever
  • Tiredness

Home care:

  • Rest and fluids
  • Honey for cough (only over 1 year — never give honey to babies under 1)
  • Saline drops for congestion
  • Steam/humidifier

School status: Keep home if fever or too uncomfortable


2. Stomach Bugs (Gastroenteritis)

What you’ll see:

  • Vomiting
  • Diarrhea
  • Stomach cramps
  • Fever

Home care:

  • Small, frequent sips of WHO-ORS (Electral / packaged ORS made up exactly as per the packet)
  • Once keeping fluids down, offer light, bland Indian foods: khichdi, curd-rice (dahi-chawal), suji/rava porridge, mashed banana, dal-rice
  • Keep breastfeeding if your baby is breastfed
  • Rest

School status: Keep home until 24-48 hours after the last episode of vomiting or diarrhoea


3. Hand-Foot-Mouth Disease

What you’ll see:

  • Fever
  • Painful mouth sores
  • Rash on hands, feet (sometimes buttocks)

Home care:

  • Cool, soft foods and drinks (curd, mashed banana, cool milk)
  • Paracetamol for pain/fever if your pediatrician advises (see dosing note below)
  • Avoid acidic/spicy foods
  • Watch closely for dehydration — mouth ulcers can make children refuse fluids

School status: Can return when fever-free and sores are healing


4. Pink Eye (Conjunctivitis)

What you’ll see:

  • Red, irritated eye(s)
  • Discharge (clear = viral; yellow/green = bacterial)
  • Crusting on eyelids

Home care:

  • Warm compresses
  • Keep hands clean
  • Don’t share towels

School status: Bacterial - return 24h after starting drops. Viral - when comfortable


5. Ear Infections

What you’ll see:

  • Ear pain (tugging at ear in babies)
  • Fever
  • Fussiness, trouble sleeping
  • Sometimes fluid draining

Home care:

  • Paracetamol for pain/fever if your pediatrician advises (see dosing note below)
  • Warm compress
  • Many resolve without antibiotics — let your pediatrician decide

School status: Can attend if comfortable and no fever


A Note on Paracetamol (Fever/Pain Relief)

Paracetamol (e.g. Crocin, Calpol) is the usual first choice for fever or pain in children in India. Use it correctly:

  • Dose by weight, not age: 15 mg/kg per dose.
  • Frequency: every 4-6 hours as needed, and no more than 4 doses (about 60 mg/kg) in 24 hours.
  • Check the syrup strength on the bottle before measuring — common Indian syrups are 120 mg/5 ml or 250 mg/5 ml, so the same dose needs a different volume. Use the measuring cup/syringe that comes with it, not a kitchen spoon.
  • Babies under 3 months: do not give any fever medicine on your own — see a doctor first (see the red flag below).
  • Treat the child’s discomfort, not just the number on the thermometer.

🚨 Babies under 3 months: ANY fever of 100.4°F (38°C) or higher is a same-day emergency. Do not medicate and wait at home — get your baby seen by a doctor or go to the nearest hospital the same day.


The “Keep Home or Send?” Decision

Keep Home If:

SignReason
Fever (100.4°F / 38°C or higher)Contagious and uncomfortable
Vomiting/diarrheaContagious, needs fluids
Severe symptomsToo sick to learn
Contagious rashSpreads to others
Pink eye with dischargeHighly contagious

Can Go to School If:

  • Mild cold symptoms, no fever
  • Feeling well enough to participate
  • 24 hours fever-free (without medication)
  • On antibiotics 24+ hours
  • Condition isn’t contagious

Prevention at Home

Daily Habits

HabitHow to Implement
HandwashingBefore meals, after bathroom, when home from school
Don’t shareWater bottles, utensils, lip balm
Cover coughsInto elbow, not hands
Stay home when sickPrevents spreading

Immune Support

  • Balanced diet (fruits, vegetables, protein)
  • 9-12 hours sleep (depending on age)
  • Regular physical activity
  • Up-to-date vaccinations as per the IAP immunisation schedule
  • Manage stress

Prepare the Home

  • Keep a thermometer handy
  • Stock WHO-ORS (Electral/ORS sachets), paracetamol syrup (note its strength), and saline nasal drops
  • Have sick-day Indian foods ready (khichdi, curd-rice, suji porridge, bananas)
  • Plan for work absences

When to Call the Doctor

See Doctor Today If:

  • High fever (above 39°C)
  • Fever lasting more than 3 days
  • Signs of dehydration
  • Severe ear or throat pain
  • Difficulty breathing
  • Symptoms worsening after improvement
  • Any fever in a baby under 3 months (100.4°F / 38°C or higher) — same day, don’t wait

Emergency Signs (Get Help Immediately):

  • Struggling to breathe / fast or laboured breathing
  • Blue lips or face
  • Stiff neck with fever
  • Won’t wake up or very drowsy / unresponsive
  • Seizure (fits)
  • Signs of severe dehydration (no urine for many hours, sunken eyes, very lethargic)

🚨 If you see any of these, call 112 (national emergency) or 108 (ambulance), or go to the nearest hospital right away. If your child has a prescribed adrenaline auto-injector for a severe allergy, use it first, then call for help.


Antibiotic Reality Check

IllnessNeed Antibiotics?
Common coldNO - viral
FluNO - viral (antivirals different)
Stomach bugNO - usually viral
Hand-foot-mouthNO - viral
Ear infectionSometimes - many resolve alone
Strep throatYES - bacterial
Pink eyeDepends on type

Important: Using antibiotics for viral infections doesn’t help and contributes to antibiotic resistance. Trust your doctor’s assessment.


Frequently Asked Questions

Q: My child gets sick constantly. Is their immune system weak?

A: Probably not! Children in school/daycare get 8-12 infections per year - this is normal. If they recover normally and are growing well, their immune system is working fine. Frequency decreases with age.

Q: Should I keep my child home for a mild cold?

A: If no fever and child feels well enough to participate, school is fine. Mild sniffles are nearly constant in school-age children, especially in winter.

Q: How long is my child contagious?

A: Varies by illness. Generally, most contagious in first 2-3 days of symptoms. Fever is a good marker - consider them contagious while febrile.

Q: Can I send my child to school with medicine?

A: Depends on school policy. Coordinate with school nurse. Never send a child who needs fever medicine to control fever - they’re still sick!

Q: How do I strengthen my child’s immunity?

A: Sleep, nutrition, exercise, and vaccines are the foundation. No supplement or product dramatically “boosts” immunity. Getting sick and recovering actually is how immunity builds.


Key Takeaways

  • Expect 8-12 illnesses per year for school-age kids - it’s normal
  • Most are viral and resolve with rest and fluids
  • Keep home if: Fever, vomiting, too sick to participate
  • Prevention: Handwashing, sleep, nutrition, vaccines
  • Know when to worry: High/prolonged fever, dehydration, breathing trouble
  • Frequency decreases as immune system matures

This article was reviewed by pediatricians at Babynama. Last updated: January 2026


General information for Indian parents, not a substitute for your pediatrician. In an emergency, call 112 or 108.


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