Problem with influenza is the vaccines are based on one or more different strains or serotypes of the virus, and what works for one particular strain or serotype may or may not work for a newer one. I still say get the shot. One of the common strains used for vaccines is "Hong Kong A", which I caught in December of '69, and that chit knocked me out of the park! Bedridden sick for a week, and weak as a girl with no real appetite for another two weeks. I was 18, 5' 11" and 160 when I caught it, weighed 145 3 weeks later. Felt like I went five rounds and lost 50-30 on all cards. You don't want to fook around with the flu!