Moderna Spikevax COVID-19 vaccine
Organization: Public Health Agency of Canada
Who should get the vaccine
The Moderna Spikevax COVID-19 vaccine is authorized for people aged 12 years and older.
You should not receive the vaccine if:
- you are allergic to any of the vaccine ingredients or any materials found in the vaccine's packaging (such as the vial cap, aluminum seal, or synthetic rubber stopper)
- you had a severe allergic reaction to a previous dose of mRNA COVID-19 vaccine
- you are experiencing symptoms of COVID-19 (such as fever, new or worsening cough and difficulty breathing)
- Note: If you are experiencing symptoms, stay home to avoid spreading COVID-19 to others and contact your local public health authority for next steps.
The Moderna Spikevax COVID-19 vaccine is administered in two separate doses. Return for your second dose at the time advised by your health care provider.
Possible side effects
Mild to moderate side effects are very common and last no more than a few days. These happen in more than one out of every 10 people after COVID-19 vaccination.
Very common side effects include:
- pain at injection site
- muscle pain
- joint pain
If you develop any serious symptoms or symptoms that could be an allergic reaction, seek medical attention right away. Symptoms of an allergic reaction include:
- hives (bumps on the skin that are often very itchy)
- swelling of the face, tongue or throat
- difficulty breathing
Follow guidance from your health care provider about where to wait and for how long (usually 15 minutes or more) after vaccination. Let them know if you are experiencing any symptoms following vaccination and ask them about ways to manage symptoms.
How the vaccine works
The Moderna Spikevax COVID-19 vaccine uses messenger RNA (mRNA) to provide instructions to your cells on how to make a protein that is found on the COVID-19 virus. Our immune system knows that the protein doesn't belong in our body and begins making immune responses, including antibodies. These immune responses will help fight the virus if you get exposed to COVID-19 in the future.
You cannot get COVID-19 from the vaccine. mRNA vaccines do not affect your DNA.
COVID-19 vaccination is a safe and effective way to help protect yourself against COVID-19. Right now, we still need to follow public health measures to reduce the spread of the multiple variants of COVID-19 and save lives.
Federal, provincial and territorial governments will continue to assess the risk of COVID-19 spread in communities. Measures will be adjusted over time as more people are vaccinated, and we learn more about the science.
Get the facts
For more information about the Moderna Spikevax COVID-19 vaccine:
- Visit Canada.ca/covid-vaccine
- Talk to your health care provider to find out if the vaccine is right for you
- Read the Moderna Spikevax product monograph found at covid-vaccine.canada.ca
- Read more about COVID-19 vaccine safety and side effects
- Learn more about COVID-19 vaccines for children and youth
- Visit the Moderna Spikevax COVID-19 vaccine website or call 1-866-MODERNA (1-866-663-3762)
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