Browse by topic
How effective are the COVID-19 vaccines?
Are COVID-19 vaccines effective against variants like Omicron?
Current vaccines provide good protection against severe illness and hospitalizations for Omicron. Some people may still get COVID-19 after they have been vaccinated (this is called “breakthrough infection”). The good news is that people that are fully vaccinated and experience a breakthrough infection are much less likely to get really sick or end up in the hospital and intensive care unit than those who are un-vaccinated and get COVID-19.
Research that took place in BC compared the effectiveness in people who had received two doses of vaccine to those who had received a booster dose.
Two doses provided good protection against severe outcomes with Omicron. Two doses prevented about 65-75% of hospitalizations (reducing the risk of COVID-19 hospitalization by about two-thirds to three-quarters compared to unvaccinated people). Two doses were less effective against Omicron infection (less than 10-15% against any infection).
Booster doses increased protection against Omicron up to more than 90% against hospitalization with Omicron and about 50-60% against Omicron infection. When you receive your invitation to book your booster, it is important to do so.
Monitoring and research on the new COVID-19 variants continues. For more information, check out this page on the BCCDC website.
Date last reviewed:
Sunday, Mar 27, 2022