School-Age & Preteen Vaccines
COVID-19 Vaccine Side Effects in Children & Teens
A sore arm and a day or two of tiredness, headache or mild fever is the usual pattern — but chest pain or breathlessness in the days after the dose needs a same-day doctor visit.
Written and fact-checked by the ParentVibes editorial team against WHO, IAP, CDC and NHS immunisation guidance. Not yet reviewed by a named clinician.
Quick facts
- Usually given
- 12+ years, per current guidance
- Vaccines used in India
- Covaxin, Corbevax (non-mRNA)
- Protects against
- Severe COVID-19 illness
- Typical reaction
- Sore arm, tiredness, mild fever
- Usually settles in
- 1–2 days
India's COVID-19 vaccination programme extended to adolescents using Covaxin and later Corbevax — both non-mRNA vaccines developed or manufactured in India. Who is eligible, and whether boosters are advised for children, has changed several times as the situation evolved, so the reliable approach is to follow the current MoHFW guidance and your paediatrician's advice rather than any fixed rule you may have read earlier.
What has stayed consistent is the side-effect pattern. Most teens experience some mix of a sore arm, tiredness, headache, mild fever or body aches for a day or two — often a touch stronger after the second dose — and then feel entirely themselves again. This page walks through that normal pattern, and is equally clear about the small set of symptoms that should never be waited out at home.
What the COVID-19 vaccines for children are
The vaccines used for Indian adolescents are non-mRNA: Covaxin is an inactivated (killed) whole-virus vaccine, and Corbevax is a protein-subunit vaccine. Both are given as injections into the upper-arm muscle and cannot cause COVID-19.
Because recommendations for this age group are updated as evidence and circumstances change, treat eligibility, dose timing and booster questions as things to confirm with your paediatrician or the current MoHFW guidance at the time of vaccination — not from older articles or forwarded messages.
Guidance moves — check the current version
COVID-19 vaccination advice for children is one of the few areas of the schedule that genuinely changes over time. Your paediatrician or the official MoHFW/CoWIN channels are the right source for what applies right now.
Common COVID-19 vaccine side effects
The pattern in teens mirrors what adults experienced — short-lived and most noticeable in the first 24–48 hours.
Sore arm at the injection site
Pain, tenderness or stiffness in the upper arm for a day or two is the most frequent reaction, sometimes with mild redness or swelling.
Tiredness and headache
Feeling drained, sleepy or headachy the evening of the dose or the next day is very common — an early night usually resets things.
Mild fever or chills
A low-grade temperature, sometimes with chills or feeling shivery, can appear within the first day and typically clears within 24–48 hours.
Body aches for a day or two
Aching muscles or joints, similar to the start of a mild flu, are part of the normal immune response and fade quickly.
Stronger reaction after the second dose
Many teens notice the second dose more than the first — a slightly higher fever or heavier tiredness. This reflects a primed immune system responding, not a problem with the vaccine.
What's usually normal after a COVID-19 vaccine
In the first couple of days, all of this fits the expected picture:
- A sore or stiff arm that makes raising it briefly uncomfortable.
- Tiredness, a headache or feeling generally flat on the day of and the day after the dose.
- A mild fever, chills or body aches within the first 48 hours.
- Reduced appetite or mild nausea for a day.
- Symptoms that are noticeably stronger after the second dose than the first, but still settle within a couple of days.
- Feeling completely well again by day 3.
How long COVID-19 vaccine side effects last
- Sore arm: usually 1–2 days.
- Tiredness, headache and body aches: typically 1–2 days.
- Fever or chills: most often within the first 24–48 hours.
- Almost all common side effects have resolved by the third day — anything still worsening at that point deserves a call to the doctor.
Home care after the COVID-19 vaccine
Plan for a low-key day or two, and let your teen's energy guide the pace.
Rest & recovery
- Schedule the dose so the next day can be light if possible — no exams or tournaments if you can help it.
- Push fluids: water, nimbu pani, soups — whatever your teen will actually drink.
- Rest is fine, but there's no need to enforce bed rest — let them do as much as they feel like.
Managing fever & aches
- For fever, headache or body aches that are genuinely bothering them, paracetamol in the dose your doctor has advised can be used after the vaccine — taking it in advance 'just in case' isn't recommended.
- Aspirin should not be given to anyone under 18.
- Light clothing and a comfortable room help with chills and low-grade fever; the sore arm prefers gentle movement over complete rest.
Warning signs — see a doctor urgently
Most post-vaccine symptoms are mild, but the following need urgent medical attention:
Seek urgent medical care if your child has
- Chest pain, breathlessness, or a racing, pounding or fluttering heartbeat in the days after any COVID-19 vaccine — this needs same-day medical review, every time, whichever vaccine was given.
- Signs of a severe allergic reaction — difficulty breathing, swelling of the face or throat, widespread hives or collapse, usually within minutes to an hour of the injection.
- Fainting or severe dizziness that doesn't resolve with lying down.
- High fever with your child confused, unusually drowsy or looking seriously unwell.
- A severe headache that keeps worsening, with vomiting or blurred vision.
- Fever, vomiting or new symptoms that begin several days after the dose and are getting worse — more likely an unrelated illness, but it needs assessment either way.
Call your doctor immediately — or go straight to the nearest emergency department.
🩺 Find a paediatricianFor chest pain or breathing difficulty, don't watch and wait — have your child seen the same day, at an emergency department if your doctor isn't reachable.
When to call your paediatrician
For anything on this list, a phone call is the right next step:
- Fever that continues beyond 48 hours after the dose.
- Side effects that are worsening on day 3 instead of fading.
- Marked tiredness that hasn't lifted several days after vaccination.
- Questions about whether your child is currently eligible for a dose or booster — recommendations change, and your paediatrician will know the current position.
- Your child had a significant reaction to a previous dose and the next one is due.
Frequently asked questions
Should I worry about myocarditis after my teen's COVID-19 vaccine?
Myocarditis (heart-muscle inflammation) has been reported rarely after mRNA COVID-19 vaccines abroad, mostly in teenage boys, and most cases were mild and recovered with care. India's vaccines for adolescents — Covaxin and Corbevax — are non-mRNA. Either way, the practical rule is the same: chest pain, breathlessness or a racing or fluttering heartbeat in the days after any COVID-19 vaccine should be checked by a doctor the same day.
Which COVID-19 vaccine do children get in India?
India's adolescent programme used Covaxin (an inactivated whole-virus vaccine) and Corbevax (a protein-subunit vaccine). What is offered, and to which ages, depends on current government policy — check CoWIN, MoHFW updates or your paediatrician for what applies when your child is due.
Why did the second dose hit harder than the first?
After the first dose, the immune system has learned to recognise the virus's features — so the second dose triggers a faster, stronger recall response, which can mean a day of higher fever or heavier tiredness. It's an expected pattern, not a sign anything went wrong.
Can my child get the COVID-19 vaccine along with other vaccines like Tdap or HPV?
Co-administration policies have varied as guidance evolved, so this is a question for your paediatrician at the visit — they'll follow the current recommendation. If doses are given separately, note each in the vaccination record so nothing is missed.
My child has a fever two days after the vaccine. Is it the vaccine or an infection?
Vaccine-related fever usually starts within the first day and settles within 48 hours. A fever that begins later, keeps climbing, or comes with symptoms like sore throat, ear pain or vomiting is more likely a coincidental infection — either way, a fever persisting beyond 48 hours after vaccination is worth a call to your doctor.
Does my teen need a COVID-19 booster?
There is no fixed, permanent answer — booster recommendations for adolescents depend on current MoHFW policy and your child's individual health situation. Rather than relying on older news reports, ask your paediatrician what is currently advised for your child's age group.
Your next steps
Track your baby's vaccines
Enter your baby's birth date to get a personalised vaccine timeline with reminders, so no dose slips.
Open Vaccination TrackerVaccination schedule India
The full IAP-style immunisation chart from birth to the teen years, explained in plain language.
See the full scheduleFind a paediatrician
Worried about a reaction, or due for the next dose? Find a trusted paediatrician near you.
Find a pediatricianRelated vaccine guides
Sources
- WHO — Vaccine safety and side effects
- Indian Academy of Pediatrics (IAP) — Immunization guidelines
- CDC — Possible side effects from vaccines
- NHS — NHS vaccinations and when to have them
- MoHFW — COVID-19 vaccination guidance
- WHO — COVID-19 advice for the public: getting vaccinated
- CDC — Safety of COVID-19 vaccines
Next review due: 6 January 2027.
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Medical disclaimer
This page is educational information about common vaccine reactions and is not a substitute for medical advice, diagnosis or treatment. Every child is different — always follow the guidance of your paediatrician or vaccination centre. If your child has trouble breathing, swelling of the face or throat, a fast heartbeat, hives all over, dizziness or weakness soon after a vaccine, or seems seriously unwell at any point, seek emergency medical care immediately. When in doubt, always get your child checked — it is never a waste of anyone's time.
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