Mine is sore from my shot yesterday, too. Pretty uneventful at the time, but a mild annoyance later. And presumably the potential of a relief from misery later still.
One would hope. Not totally convinced, but certainly easy enough to get one.
There's a lot of discussion on-line about the 2017 Northern Hemisphere Flu Shot. And the H3N2 flu virus that was so active last year. So I've opted to skip the injection this year, principally based on the Repeat Vaccination Effect
....Some winters people who were vaccinated two seasons in a row seem to be more apt to contract the flu than people who were only vaccinated in the season under study. The still-emerging theory suggests that when people are revaccinated with the same target virus, their immune system doesn’t generate as many antibodies as when it is presented with a new target. Then if the viruses they encounter are different from the viruses in the vaccine, the fact they generated fewer antibodies puts them at higher risk of infection. This year’s Northern Hemisphere flu shot contains the exact same H3N2 component as last year’s. And as the updating of the Southern Hemisphere vaccine signals, the H3 viruses have mutated. So the repeat vaccination effect may be a factor this winter...