[reducesuffering]

If folks can't produce a confirmed positive covid test or antibody test, then they can effectively be treated as unprotected because there's no evidence they have protection, that's fine.

> If you mean allow workers at an old folks home to opt out based on a prior positive test that is unreasonable. If it makes you even possibly slightly less likely to kill the old folks you should get the jab.

Where is the line drawn? Maybe it would be more effective for people with 2 doses to get a third? What science is there showing antibodies + 1 shot is more marginal protection than 3 shots?

[michaelmrose]

It should be drawn where it's safe to draw it based on current knowledge.

I don't believe that it's firmly established that natural immunity is as good as 2 shots or natural immunity + 1 shot.

We bought more than enough doses to vaccinate everyone and downsides are small.

Consider a population of 10 million with natural immunity. Let us suppose that vaccination with Pfizer will kill between 0 and 1.

Suppose that 1% would fall ill and 1% of those die. That is 1000 preventable deaths.

It needn't be very much of a difference just 1/100th of 1% to vastly outweigh the risk of a very safe vaccine.