Applies to sars-cov-2 (covid-19) mrna-1273 (6m-5y bivalent booster) vaccine: intramuscular suspension.
Becoming infected with COVID-19 is much more dangerous to your health than receiving this vaccine.
Get emergency medical help if you have signs of an allergic reaction: hives, rash; dizziness, weakness, fast heartbeats; difficult breathing; swelling of your face, lips, tongue, or throat.
Your vaccination provider may want to watch you for a short time after your shot, to make sure you don't have an allergic reaction. You will be treated quickly if you have a reaction right after you receive the vaccine.
You should not receive this vaccine if the first shot of COVID-19 vaccine caused an allergic reaction. Your doctor or vaccination provider will determine if you can safely receive this vaccine.
Not all possible side effects are known. Becoming infected with COVID-19 is much more dangerous to your health than receiving this vaccine.
Some people receiving this vaccine had inflammation of the heart muscle or the lining around the heart within a few days after receiving this vaccine, but the risk of this side effect is very low. Seek medical attention right away if you have:
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chest pain;
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shortness of breath; or
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fast or pounding heartbeats or fluttering in your chest.
Common side effects may include:
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fever, chills;
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redness or a hardness and swelling where the shot was given;
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swelling or tenderness under your arm;
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nausea, vomiting;
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feeling tired; or
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headache, muscle pain, joint pain.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects.
You may also use a smartphone-based program called V-safe to communicate with the Centers for Disease Control and Prevention (CDC) about any health problems you have after receiving a COVID-19 vaccine: www.cdc.gov/vsafe.
