You can choose one or more than one option Flu is a disease induced by the Influenza virus, we need to repeat every year the vaccination against the flu because: the vaccine against the flu contains...

You can choose one or more than one option

Flu is a disease induced by the Influenza virus, we need to repeat every year the vaccination against the flu because:

• the vaccine against the flu contains inactivated viruses that stimulate immunity for 6 months.


• annual vaccination results in the production of IgA and not of other immunoglobulin


• the flu virus presents antigenic variation in its capsid proteins.


• the flu virus presents antigenic variation in its envelope proteins.


• the flu vaccine is expired after six months