Actually it didn't at first. The Spanish Flu went through 3 waves. The first wave was very similar to the standard flu. Fairly mild, primarily killed the eld

Actually it didn't at first. The Spanish Flu went through 3 waves. The first wave was very similar to the standard flu. Fairly mild, primarily killed the elderly and sick. It first appeared around January. The 2nd wave is what killed young people. It didn't show up until August.