3 ms·

Flu shot efficacy is 50% in a good year. Many years, the flu shot is much less effective than 50%: https://en.wikipedia.org/wiki/Influenza_vaccine#Effectivenes

• danaris 4y ago
  ...and the point of this article is that it should be good every year. It will be interesting to see whether it also provides better than 50% efficacy.
  • LarryMullins 4y ago
    > ...and the point of this article is that it should be good every year. That's their aspiration. Time will tell.