Originally posted by TheLurch
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Nope. modern humans hadn't left Africa in any significant numbers until about 60,000 years ago, and human populations were relatively small, sparse, and limited to favorable environments until about 12,000 years ago when the last ice age ended.
We're currently exposing ourselves to viruses that have no significant history with humans.
There is absolutely no evidence for this. It was suggested early in the pandemic, but it's become clear that even having had direct exposure to SARS-CoV-2 doesn't necessarily generate a protective immune response. Exposure to a more distantly related virus would necessarily provide even less protection.
Also, for the most part, you don't "inherit immunity." * You develop it after exposure.
* The exception being that there are some variants in the innate immune response that float around in the human population.
We're currently exposing ourselves to viruses that have no significant history with humans.
There is absolutely no evidence for this. It was suggested early in the pandemic, but it's become clear that even having had direct exposure to SARS-CoV-2 doesn't necessarily generate a protective immune response. Exposure to a more distantly related virus would necessarily provide even less protection.
Also, for the most part, you don't "inherit immunity." * You develop it after exposure.
* The exception being that there are some variants in the innate immune response that float around in the human population.
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