Understanding COMIRNATY
safety information for
someone you care for

COMIRNATY is a vaccine for use in people 12 years of age and older to protect against coronavirus disease 2019 (COVID-19).

Side Effects & Safety

Older adult male seated with a serious expression

The CDC, FDA, and other federal agencies rigorously monitor the safety of COVID-19 vaccines and share information with the public as soon as it becomes available.

Learn more from the CDC

Serious risks of COMIRNATY can include:

Severe allergic reactions
Myocarditis (inflammation of the heart muscle)
Pericarditis (inflammation of the lining outside the heart)

Some people may faint after vaccination, and people with weakened immune systems may have a reduced immune response.

Common side effects of COMIRNATY in people 12 years of age and older include:

Pain, swelling, or redness where the shot is given
Tiredness (fatigue)
Headache
Chills
Muscle and/or joint pain
Fever

These may not be all the possible side effects of COMIRNATY. Ask your healthcare provider about any side effects that concern you.

Learn more about safety

The CDC, FDA, and other federal agencies rigorously monitor the safety of COVID-19 vaccines and share information with the public as soon as it becomes available.

Learn more from the CDC

What Should You Tell the Vaccination Provider Before You or Your Child Get COMIRNATY?

Tell your vaccination provider about all of your medical conditions, including if you or your child (12 years of age and older):

Have any allergies
Had a severe allergic reaction after receiving a previous dose of any COVID-19 vaccine
Have had myocarditis (inflammation of the heart muscle) or pericarditis (inflammation of the lining outside the heart)
Have a fever
Have a bleeding disorder or are on a blood thinner
Are immunocompromised or are on a medicine that affects your immune system
Are pregnant, plan to become pregnant, or are breastfeeding
Have received another COVID‑19 vaccine
Have ever fainted in association with an injection