date:Oct 18, 2013
onsistent between strains and virulence traits appear to be polygenic.
Currently, the number and type of mutations, as well as the genetic constellation that would be needed for efficient human-to-human transmission of H3N2v is unknown.
It is currently not possible to predict which changes (mutations or reassortments) within the H3N2v could enable it become a new pandemic influenza virus. Hence it is not possible to set up a system to monitor the most important factors () that would suggest a