Vaccines for the flu virus are almost impossible to create (vaccines are highly specific, if the virus changes, the vaccine is inneffective):
● this virus changes continuously and therefore – since it takes months of work since a virus is discovered – when the vaccine is ready the virus has already changed (and the vaccine is ineffective)
● the virus is “intelligent” and over the years it has become increasingly capable of resisting vaccines (it is a bit of a problem with antibiotics, the use of which creates increasingly resistant bacteria).
