The flu vaccine is a safe, effective way to protect yourself and those around you during the flu season.
Its effectiveness depends on:
- The match between the vaccine strains and the influenza strains circulating in the community; and
- The age and the immune response of the person being immunized.
While the vaccine is more effective in people who are younger and otherwise healthy, such as children and adults, it is especially important for seniors and persons with underlying health conditions to get vaccinated. Even if a person gets influenza after getting immunized, they usually have a milder illness and are less likely to require hospitalization.
Influenza viral strains in this year's publicly funded vaccines
The vaccines used this year contain the influenza A and B viral strains that have been identified by the World Health Organization as most likely to circulate in 2017-2018. See Seasonal Influenza Vaccine Fact Sheet for more information.