H1N1 vaccine helps preventing influenza infection and its complications. About 2 weeks after vaccination, antibodies that provide protection against 2009 H1N1 influenza virus infection will develop in the body.

This vaccine is useful for both infants and for adults. If you are giving a dose to an infant give him 0.25ml. This dose is based on previous influenza vaccine efficiency, due to a lack of testing on this specific vaccine. H1N1 Vaccine is also useful for pregnant women. They can use this vaccine during the period of pregnancy too.

Children under age 10 are recommended to receive two doses of the vaccine, 4 weeks apart, to achieve full protection. The good thing about this vaccine is that if some suffer from its side effect they will not cause any serious problem and they will also last for only two days.