This isn’t really my area of expertise, I would imagine Gaia will give you the best answer. It is true that we eat a lot better now (That’s why people are bigger than they used to be) so my guess is chidren are stronger now.
I am not sure. I would say that we got stronger for some “old” viruses but we are weaker for the some others, especially the new ones. A virus evolves with times, just think about how many flu viruses there are around in winter time -not all of them as a vaccine.
Difficult to tell for viruses. In general, though, children live a lot longer than they used to. Did you know a long time ago before proper medicine was invented, people were lucky if they grew to be 40 years old 😕
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Ell-Bell commented on :
thank you very much Gaia