Will the vaccine work against new variants of COVID-19?
Yes, the vaccines approved in Canada are proving effective against variants of concern, such as the Delta variant. They are still especially effective at preventing severe illness and death.
Scientists and physicians around the world are monitoring the effectiveness of the vaccines against new variants of concern very closely, including the Alpha variant first identified in the UK (B.1.1.7) and the Delta variant first identified in India (B.1.617).
The scientific evidence is showing the vaccines are effective against these variants. Effectiveness after a single dose appears to be weaker, but there is still very strong protection after two doses. This reinforces the need to get both shots to be fully protected.
One way to slow down new variants from emerging is getting most people vaccinated as soon as possible. Even if you don’t think you need the vaccine to protect yourself, getting it can help to prevent mutations and new variants from emerging.
You can learn more from:
• Do COVID-19 vaccines protect against the variants? (Mayo Clinic)
• Here’s How Well COVID-19 Vaccines Work Against the Delta Variant (HealthLine)
• Vaccines highly effective against hospitalisation from Delta variant (Public Health England)
• The effects of virus variants on COVID-19 vaccines (World Health Organization)
• Effectiveness of Covid-19 Vaccines against the B.1.617.2 (Delta) Variant (New England Journal of Medicine)