date:Oct 18, 2013
censed vaccines based on closely related H3N2 strains could be useful.
With respect to the use of vaccines in relation to the possible evolution of variants of influenza viruses posing a risk to public and animal health, vaccination might increase antigenic drift of circulating influenza strains, and newly appearing variant might not be neutralized by vaccine-induced antibodies. However, based on current knowledge there is no indication that the latter has happened with the use of the available