Ka-pi96 said:
The flu has a vaccine that's used every year though. I don't know if they need to change it slightly or whatever, but regardless there is a yearly flu vaccine. It's even given out for free every year in the UK to vulnerable/elderly people. |
1) every year they make a "new" vaccine to offer to the elderly and at risk (when they assume a newer strain hits).
2) they cant give vaccines for everything, so they try to "guess" which flu will spread and hit their country in advance, and vaccinate before then.
This means they sometimes "guess" wrong, ei. you give them a vaccine that doesnt help against the flu that actually hit you.
3) even with a vaccine against the flu, your not 100% safe. Some of these are like 30% effective.
Theres already 3+ strains of coronavirus (covid19) out there (and 1000's of mutations).
This means that a american vaccine that works against the american version of this virus, might not work against the european one, and vice versa.
Its a mess.