The most frequent vaccine reactions in children following influenza immunization are similar to those seen after other childhood immunizations (such as soreness at the injection site, or fever).

Immunization is also a key strategy to ensure global health security and for responding to the threat of emerging infections such as pandemic influenza.

Seasonal influenza and pandemic influenza vaccines can be administered together, and there is a public health value in doing so, according to a global panel of immunization experts.