COVID-19 vaccine Moderna

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Organization: Public Health Agency of Canada

Published: 2021-05-07

Who should get the vaccine

The COVID-19 vaccine Moderna is authorized for people aged 12 years and older.

You should not receive the vaccine if:

Second dose

The COVID-19 vaccine Moderna 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:

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:

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 COVID-19 vaccine Moderna 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

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 COVID-19 vaccine Moderna:

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