> the likelihood of becoming infected may rise with the size of that "dose." This is correct. > So a small dose might still prime the immune system even if yo

> the likelihood of becoming infected may rise with the size of that "dose." This is correct. > So a small dose might still prime the immune system even if you don't get sick. This does not follow. If you don't get infected following a small dose, you'll have fought it off with your innane or intrinsic defenses. You won't generate any humoral immunity, form T-cells or B-cells or neutralizing antibodies and won't be any better off for the next round with the virus.