value1008: Blood groups
Great! I am type "A"! But I don't care what your blood type is if someone with active COVID breathes on you. If that happens, you definitely will get the infection. If you are near an infectee but don't get close, your chances of contracting it are lower, and if you are in a store, say, but not near an infectee, your chances are low.
I was going to get up early and dash into the store to buy frozen strawberries, which are loaded with Vitamin C, but I overslept.