Comment by rossdavidh

Depends on the flu, and on how effective that year's flu vaccine is. The 1918-1919 flu had its highest mortality rate in the young adult range, where it was unquestionably higher than covid-19 (although the lack of PCR tests or equivalent back then make it difficult to arrive at precise numbers infected). https://en.wikipedia.org/wiki/Spanish_flu#Epidemiology_and_p...