Flu shot is more of a placebo. I never had the flu shot and got the flu only a couple of times in my life. I have seen people get sick after the flu shot. So apparently not getting the shot works better
Haven’t had a flu shot since my college boyfriend got one and was sick as a dog with the flu for a week.
with efficacy of in some years...about 25%...the flu shot has a problem. moderna and pfizer is even worse...it doesn’t prevent it at all.