PANDEMIC INFLUENZA VACCINES

Influenza viruses have caused seasonal epidemics, and, on occasions, globally widespread, severe pandemic influenza outbreaks. three influenza pandemics emerged in 20th century caused millions of death. the availability of safe and effective vaccines is important to limit the impact of such outbreaks and considered a high priority by the world health organization. today, in addition to seasonal human influenza vaccines, there is a concensus on requiring prepandemic and pandemic vaccines. this paper has reviewed up-to-date information on prepandemic/pandemic influenza vaccines.