Vaccine and Antivirals

What is a vaccine?

Vaccines are injections that give you a high level of immunity to a virus. Each time a new virus is discovered, a new vaccine must be developed (even for seasonal flu).

In Canada, there will be enough H1N1 vaccine for everyone who wants and needs it. Those who need it most will get it first. Each province and territory is responsible for setting up programs to administer the vaccine to the public.

What is an antiviral?

Antivirals are prescription medications used to treat viral illnesses, including the flu. If taken shortly after getting sick (within the first 24 to 48 hours), they can reduce flu symptoms, shorten the length of illness and may reduce serious complications. They are available in two forms: a pill (called oseltamivir or Tamiflu^®) or an inhaler (called zanamivir or Relenza^®).

If a doctor prescribes antivirals for you, it's important that you finish your entire prescription. This will avoid the risk of the virus becoming resistant to the drugs. Antivirals are effective against seasonal and H1N1 flu.