Flu has come early this winter, and experts predict it could be a particularly nasty season because of a new mutated version of the virus which is circulating.
The NHS has already sent out a "flu jab SOS" encouraging vulnerable people to get their free vaccination.
But should you pay for a jab even if you are generally fit and healthy?
The version circulating this winter is H3N2 "subclade K", a type of seasonal influenza A virus. Some are calling it "super flu".
People have not encountered much of it in recent years, which means there is less built up immunity against it in the community.
