[semimojo]

And because the vaccines are not perfectly effective at preventing breakthrough cases, they are effectively exerting a very strong kind of selection on the virus.

Saying we should never deploy a vaccine unless it’s perfectly effective is saying we should never deploy a vaccine.

[ransomnote]

Saying we should never deploy a vaccine unless it’s perfectly effective is saying we should never deploy a vaccine.
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I’m guessing you already know he didn’t say “we should never deploy a vaccine unless it’s perfectly effective” and are just being disruptive.

He and others, like vaccine developer Geert Vanden Bossche are pointing to a well known principle of ‘vaccine escape’ which occurs when one vaccinates at a high point in an epidemic or pandemic. There’s so much selective pressure on the virus that only the strong survives and can go one to attack the vaccinated without their immune system recognizing the pathogen at all. This is immune escape.