Interesting thread….But the thesis is flawed
The research suggests that European DNA which has traces of Neanderthal or Denisovan DNA is stronger or has a better immune system than that of African DNA that has none, but fails to provide any evidence to support the claim. No examples of this superior immune system other than it “may have helped whoever had it against the local germs in the area at the time.” What germs? This shit seems mad Eurocentric, it is widely accepted that humans were “specialized” to their specific geographical regions. Therefore an African in Europe would be at a biological disadvantage while the European in Africa would experience a similar disadvantage. The evidence acknowledges that all humanoid groups were found in Africa, including Neanderthal, So why suggest that this “interbreeding” originated in Europe and placed Africans at a disadvantage?