English: The mortality graphs see the results of total deaths due to Spanish Flu due to differences of the public healthcare responses to the Spanish Flu outbreak

Philadelphia: The first cases of disease among civilians in Philadelphia were reported on September 17, 1918, but authorities downplayed their significance and allowed large public gatherings, notably a city-wide parade on September 28, 1918, to continue. School closures, bans on public gatherings, and other social distancing interventions were not implemented until October 3, when disease spread had already begun to overwhelm local medical and public health resources.

St Louis: In contrast, the first cases of disease among civilians in St. Louis were reported on October 5, and authorities moved rapidly to introduce a broad series of measures designed to promote social distancing, implementing these on October 7.

This curve is used to illustrate the effect of social distance on slowing down the Covid-19 spread to ensure the hospital resources are manageable to handle the treatment of most ;if not ALL of Covid-19 cases