[MD Expat in PA]

Never included in these discussions on the 1918 flu was the abominable state of public health at the time.

But influenza is a virus and is not caused by dirty drinking water or lack of sanitation such as cholera and typhoid which are caused by a bacteria.

[logi_cal869]

Stating the obvious. Regardless, immune system strength is a factor.

This plays into the current state of things as well, as the CDC admits that influenza “can create or exacerbate other health factors.” This is a problem in industrialized nations.