You bet it does. Give it a shot A flu vaccination is 70 to 90 per cent effective in preventing the flu in healthy adults, and about 70 per cent effective in preventing flu with fever in children. Your doctor, a medical clinic, a public health nurse or local health unit can provide a vaccination, either free or at minimal cost. The vaccine generally takes effect about two weeks after immunization, and protection may last six months or longer. October or November are the best times to be vaccinated.
Influenza vaccine protects against certain strains of influenza.
Since the strains of influenza that circulate change every year, it is necessary to make a new influenza vaccine for each winter . This is why a yearly flu shot is recommended. Influenza vaccination cannot cause influenza because the vaccine does not contain live virus. Minor soreness at the injection site lasting up to two days is common. Allergic reactions are rare.