Influenza a Virus (H1N1)

Influenza is a contagious respiratory disease and its main etiological agent is the Influenza A virus, which is responsible for several pandemics. Viruses belonging to this genus are constantly mutable beyond being difficult to control and eradicate. The H1N1 flu is one of the most frequent types and in this year it has already killed about 70 people. Currently Brazil produces a vaccine and distributes it in annual campaigns to avoid epidemic outbreaks of this disease. This vaccine presents in its formulation mercury-based excipients, generating several debates around the theme. For this reason this study aims to present a recent content of H1N1 history.