Vaccines work by activating the immune system similarly to how the body would react to a virus or bacterium. This reaction gives your immune system memory so that it is prepared to defend against future contact with that virus or bacterium.
Routine vaccines are available free of charge to Nova Scotians. Speak to your healthcare provider or read more about which vaccines are recommended for your age group here: Immunizations | Nova Scotia Health (nshealth.ca)
Visit Immunize Canada for common questions about vaccines and immunization: Questions and Answers | immunizecanada