o effect on them.  Umm..  Hunter/gatherers throughout recorded time
have
>been especially weak to new bacterial and virus outbreaks.

You know what happened to many HGs is they became weakened by
processed
foods.(haven't we all!)

So when missionaries and others with processed food supplies came in,
they
began trading with HGs and selling them this awful food ...(sugar,
salt,
coffee, flour, biscuits, processed foods)

Then the HGs became vitamin deficient.

Many contracted diseases, such as tuberculosis.

When  HGs returned to their native diets, they recovered.