Usually the flu vax comes out around Sept. You have to have it annually so I take it that means it has a shelf life in your system. Does anyone know how long it offered immunity for? I am trying to see when is the best time to get the vaccination as they govt. is offering my age group free flu jabs but it will be in December or later by the time they get to this group which IMO is a bit late.
When is the best/earliest time to get the flu jab?