COVID Vaccines in Canada

Since the start of the COVID-19 pandemic, scientists all over the world have been hard at work studying the virus, how it impacts individuals of all ages, races and genders, and creating vaccines to help prevent infection and transmission.

To date, Health Canada has approved the use of the following vaccines:

Pfizer-BioNTech and Moderna Vaccines

Both the Pfizer-BioNTech and Moderna vaccines require the patient to receive two injections (a priming dose, followed by a booster shot) for full efficiency. If you receive the Pfizer-BioNTech vaccine, the recommended interval between doses is 28 days; while 21 days is recommended for those who receive the Pfizer-BioNTech vaccine. However, many parts of the world have extended intervals between doses anywhere from 42 days to 4 months.

AstraZeneca Vaccine

The AstraZeneca vaccine is what’s known as a genetically modified adenovirus-vectored vaccine which also carries spike protein. Similar to the Pfizer and Moderna vaccines, when the AstraZeneca virus is administered the body will then build up a strong immune response against this spike protein and produce antibodies, protecting you from COVID-19.

Vaccine Side Effects

When Can I Get My Vaccine?

Originally published at on March 3, 2021.

Dr. Ali Ghahary is a Family Physician in Vancouver, British Columbia, Canada.

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