Arab Nights (imported) wrote: Tue Sep 01, 2020 10:17 am Question for TopMan. You seem pretty knowledgeable. I believed in vaccines for years. If you were a kid in the 50s a nightmare was polio and living in an iron lung. The polio vaccine pretty much ended that nightmare. I have gotten vaccines for some of the wonderful things like yellow fever before working in iffy countries and everything always went as predicted and never got diseases. But I do have to admit that the last couple of years the flu vaccine didn't seem to work that well. I would get sick after injection. It could be from age except I would see it happening to people in their 30s and 40s. Last flu season I got sick after the shot and then 3 or 4 times afterwards. In your opinion, is that because flu viri mutate quickly and somebody has to make a stab at what vaccine to manufacture in time for the season and some times that stab does not match flu mutations? The next question then is that polio, yellow fever, etc. don't mutate? Final question is if Covid mutates. My guess is that it does. Any comments.
I think you are correct. They have to make the decision in the spring as to what goes in the flu shot in the fall. Sometimes they get it wrong.