I was under the impression that a virus like the common cold or measles brought by h. sapiens wiped out the neanderthals
Based on what evidence?
Viral infections rarely leave any trace on the bones (if at all), and finding viral DNA would be unlikely even if a neanderthal *did* die from a virus. Even if you could detect viral DNA fragments in the remains, there's no way to be sure that the neanderthal in question actually died from the virus it was carrying.
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