Actually the flu shot is more reliable than the covid shot. The flu doesn't seem to keep muting, but rotates between a few types. Some years they guess better than others what strain it will be.
Only thing obvious is that people don't understand immune systems and the too many snake oil salesman are out to make money on this lack of understanding, including too many in the medical profession.
Originally Posted by farmstud60
https://health.clevelandclinic.org/flu-strains/
Sorry, but according to the cleveland clinic- a great source for medical information; the Flu- like the majority of viruses, continue to mutate all the time. Flu shots try to stay ahead based on testing and seeing what strains are gaining in both testing, and in virulent mutation, but the shot is and always has been a best guess-timate. As it mutates, it might mimick a prior strain, but it's regenerating into new strains all the time.
You could claim that it's snake oil, or for $ or not, but flu shots save more elderly and young people every year than a majority of other treatments. And as a prophylactic care against catching a heavy or deadly case of the flu, it typically helps with making symptoms better than a non immunized person. Of course you don't have to take it- and you can just as easily not wear a condom fucking a ho. Immune response aside. The old saying of "Pay your money and take your chances", but flu shots are statistically a safe bet, and proven safe by YEARS of them being provided.