COVID-19: Effectiveness and benefits of vaccination

Vaccination is one of the most effective ways to protect our families, communities and ourselves against COVID-19. Evidence indicates that vaccines are very effective at preventing severe illness, hospitalization and death from COVID-19, including against Alpha and Delta variants of concern. However, there’s a small percentage of the population who are vaccinated that will still be infected with COVID-19 if they’re exposed to the virus.

Data and Resources

Additional Info

Field	Value
Last Updated	April 17, 2026, 20:13 (UTC)
Created	April 17, 2026, 20:13 (UTC)
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open_canada_date_published	2021-09-22 00:00:00
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open_canada_subject	["health_and_safety"]
sensitivity_level	unrestricted
title_fr	COVID-19 : Efficacité et avantages de la vaccination
update_frequency	unknown