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VACCINE QUESTION OF THE DAY: I’VE HEARD OF SOMEONE GETTING COVID AFTER BEING VACCINATED, WHY IS THAT?


When a person is vaccinated, it takes two to three weeks to gain protection from the COVID-19 virus. If someone was exposed to the COVID-19 virus before receiving the vaccine, they may be incubating the virus and test positive after their vaccination. This means that if a person contracted the virus before getting the vaccine, or within the period following vaccination when protection is still building in the body, they may still get sick from COVID-19.

At Thursday’s Ministry of Health briefing, Dr. Bonnie Henry, Provincial Health Officer, also said approximately 0.7 per cent of people who have received one dose of vaccine tested positive with COVID-19 after 14 days, and about 0.4 per cent of people tested positive after two doses.

All of the COVID-19 vaccines approved for use in Canada provide excellent protection against severe COVID-19 infection, hospitalization, and death, even with one dose. We are still learning more about whether someone who has been immunized can acquire and transmit the virus.

At this time, even if you have had the vaccine, it is still important to continue to follow infection prevention and control measures, as no vaccine offers 100% protection. This means staying home when sick, maintaining good hand hygiene, physically distancing, and wearing a mask when you cannot distance.

This page last updated Apr 16, 2021 5:27pm PDT