I think you are right. The last I read, they counted the shots given and divided by 2. There are plenty people who already had 3. Lots of vials went to waste (not kept on right temperature, leftovers etc.) Your statement, walking dead people, reminds me of an excellent piece I read a while ago on Medium, https://medium.com/the-haven/according-to-science-youre-already-dead-1a6f63681b1 It helped me get over a depressive period this summer, when several friends refused to see me and family members scolded me, the black sheep the unvaxxed.