There are some common side effects such as pain, and redness at the injection site. These will pass quickly.
Your child might have some side effects after vaccines such as headache, muscle aches, fever or chills, nausea, vomiting, and diarrhea, and swollen lymph nodes under the armpit.
The most commonly reported symptoms specific to infants 6 months to 36 months include:
- loss of appetite
Serious side effects
Serious side effects are very rare, but if you notice any concerning health or behaviour changes contact 811 or your healthcare provider.
Rare cases of inflammation of the heart (myocarditis and pericarditis) have been reported after getting the COVID-19 mRNA vaccines. These were most often seen:
- after a second dose of the vaccine when the time between doses was less than 8 weeks
- in males 12-29 years of age
- with a higher dose of the Moderna vaccine
The risk of myocarditis is much greater in young children who get a COVID-19 infection than the risk following the vaccination.
Symptoms to look out for:
- Chest pain
- Shortness of breath
- Feeling of a rapid or feeling of fast beating, fluttering, or pounding heart.
If your child experiences these symptoms seek medical attention right away. Inform the health care provider that your child received a COVID-19 vaccine recently.