Although this seems intuitive, it’s not true for all epidemics. The 1918 flu disproportionately killed healthy young adults. Why? Their immune systems reacted

Although this seems intuitive, it’s not true for all epidemics. The 1918 flu disproportionately killed healthy young adults. Why? Their immune systems reacted more strongly to the flu. But the immune reaction (fever and phlegm) was so strong that it ultimately ended up killing the patients before the pathogens.