Well, first off, I said "guess", so that doesn't make me an expert.
Second, my doofus brother in-law and his wife came to his parents' house, along with the rest of the family, to turn off my father in-law's pacemaker to end his life. Two hours into the process, doofus lays down on the floor, removes his mask (again) and tells everyone he's had a fever for two days. Idiot. Everyone in that room with the exception of my father in-law got COVID from him. 5 days later I found his mother lying in her bed half dressed, completely incoherent. Couldn't move. Called an ambulance and she spent 5 days in the hospital. That was in November/December. Yesterday, doofus brother in-law posts of facebook that there's no way he's ever gonna get the vaccine. He's an idiot.