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Re:Pfizer board member suggests end to mask, vaccine mandates by jkhdigital on Wednesday January 26, 2022 @08:13PM (#30094698)
Meanwhile… my sister and her daughter had a Covid sandwich: caught it in summer 2020, got vaccinated as soon as feasible, then caught it again a few days ago.

Anecdotally, my sister is one of those people who “catches everything” so I can’t say I’m surprised, but clearly there is no such thing as absolute sterilizing immunity (natural or vaccine-induced) for this particular coronavirus.

Re:Pfizer board member suggests end to mask, vaccine mandates by vaxskeptic on Wednesday January 26, 2022 @10:49PM (#30095965)
It's not specific to this one, it's true of all coronaviruses.

This article explains why it's so hard to make a vaccine for coronaviruses:

https://www.abc.net.au/news/health/2020-04-17/coronavirus-va...

Of course, this was written a few weeks before "Project Warp Speed" when everyone and their dog announced that had found a vaccine for this brand new coronavirus.