Different flu strains have affected different age groups. For example, the 1918 flu pandemic killed 25-50 million people and disproportionately affected young a

Different flu strains have affected different age groups. For example, the 1918 flu pandemic killed 25-50 million people and disproportionately affected young adults: https://en.wikipedia.org/wiki/Spanish_flu https://en.wikipedia.org/wiki/Spanish_flu