[solinent]

I have no clue, I'm not an expert. I just don't see any discussion on this topic and it concerns me. Historically, I don't see any vaccine which was effective against such a virulent virus, unless it had a much higher rate of immunity. I'd gamble on 5% odds if the reward was high enough, so 95% immunity sounds good but it's only half as strong 97.5% immunity, for example.

I do know that the immunity may only be temporary--1 out of 20 cases of the most virulent strains may then have a larger substrate to mutate within, but I'm not sure if you can get many strains at once, for example. I do know that the flu mutates each year, and I guess I'm basing this whole "increased selection pressure could cause more mutations" on that fact. When there is less available space for the virus to propagate, it's only chance of survival is to be able to infect those who are already immune.

In my opinion, we have an immune system crisis here--we need to focus on eating better and exercising more: we have to fight this virus with every tool we've got, but if we wait a few more months it's possible that we'll get a stronger vaccine. I suspect that's why it ended sooner in certain places--I doubt any measure we can take have had any real effect due to the virulence of COVID--it's in the air and on surfaces and lives there for days, and is transmitted by asymptomatic carriers--so your uber eats driver driving in their car with the AC will infect your food etc.