It's called a flu shot...not a flu vaccine. There is no vaccine for the flu. The strains change and so do the shots. Just depends on what the flu labs and the shot labs decide to put out in any given year.
You’re sort of right. Yes the flu and any virus cannot be cured and do mutate to continually infect humans. The flu shot is a vaccine for what some scientists/whoever is in charge of that believe will be the strain(s) most likely to be prominent that season. They can obviously be wrong and that shows in years with high flu/pneumonia deaths.
It's called a flu shot...not a flu vaccine. There is no vaccine for the flu. The strains change and so do the shots. Just depends on what the flu labs and the shot labs decide to put out in any given year.
You’re sort of right. Yes the flu and any virus cannot be cured and do mutate to continually infect humans. The flu shot is a vaccine for what some scientists/whoever is in charge of that believe will be the strain(s) most likely to be prominent that season. They can obviously be wrong and that shows in years with high flu/pneumonia deaths.