I believe there has been *some* evidence to suggest that improved sanitation rather than jabs was the thing which reduced epidemics of viruses. Based I think on the fact that most of the major damaging viruses were already on their way out prior to the introduction of mass inoculation. I don't know if that's true (I don't have any data to back it up) but from what she told me that's one of the reasons my Mother (who did research available literature) never had me inoculated against anything as a child. As I've never been used to having jabs for anything I never got into the habit of doing so in adulthood. I went through all the childhood illnesses and though I get the odd malaise (quite infrequently, though I have just had a cold), I can't imagine myself ever becoming concerned enough about catching flue to consider starting to do so. I know two people that have had pneumonia, one is a long term alcoholic who has multiple serious health problems, the other was my eighty five year old grandmother who died in hospital from it after a major operation. I guess if I saw more pneumonia killing off otherwise healthy people I might start to get concerned and consider it a serious enough threat to get a winter flue jab.