Hemagglutinin and neuramidinase are
the key weapons of the virus.
Hemagglutinin binds to the target cells, especially the epithelial cells of the respiratory tract
Neuramidinase behaves like a pair of scissors,:cleaving from the target cells the new viruses that they have just manufactured, thanks to the mechanisms of viral replication. These new viruses disseminate. It is essentially during the first 48 hours of the infection that therapy has its greatest opportunity of checking dissemination
