Dear Dr. Roach: I would like to ask you a basic question about COVID-19 booster shots, since no health authority seems to answer it directly. Why should I get a booster if the booster is based on the original alpha version of the virus from more than two years ago? Even if the booster shot were based on the delta variant, that variant passed through a long time ago. I had my two main Pfizer shots last summer while delta was raging, but now that the virus has morphed into weaker variants, the booster shot does not seem relevant or necessary. People are back to doing things in large groups, and if you get the virus, most likely you’ll get just mild, cold-like symptoms. So, why get a booster shot now if it won’t be effective against current variants?