Which group was most affected by the spanish flu?

The group most affected by the Spanish flu were young adults, particularly those aged 20 to 40. Unlike typical influenza strains, which primarily impact the very young and the elderly, the Spanish flu exhibited a high mortality rate among this age group, likely due to a strong immune response that led to severe complications. Additionally, pregnant women faced higher risks, with increased mortality rates during the pandemic. Overall, the Spanish flu had widespread impacts across various Demographics, but young adults were notably vulnerable.