@ slim - you have not addressed the elephant in the room: if Covid 19 is an outright killer on its own, why are millions not dying?
I don't think you're being accurate when you say that "countless" healthy doctors & nurses have died. Can you provide actual statistics to prove how many "countless" represents? Also, it appears that even the experts don't understand why a very few apparently healthy individuals have died, but they're trying to figure it out - because it shouldn't & doesn't kill the vast majority of healthy persons. Something unknown is involved in such cases.
"Some researchers have suggested that it could be down to a person's DNA - and are carrying out research to confirm their theory. In particular, experts say gene coding for the cell surface protein angiotensin-converting enzyme 2 (ACE2), which the coronavirus uses to enter airway cells, could hold the answer." https://www.thesun.co.uk/news/11337985/new-theories-coronavirus-killing-young-healthy-people/