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. |
"New versions of the vaccines are developed twice a year, as the influenza virus rapidly changes."
https://en.wikipedia.org/wiki/Influenza_vaccine







