This may be old news but I found two graphs of Covid-19 cases from last month which had an uncanny resemblance to a graph given in a paper by Hatchett, et al. (2007) (see below for citation). When the two original curves in their graph were replaced by bell curves in order to illustrate flattening the curve, a lesson was lost. I have attached a PDF showing what I found. I have been off this discussion list for about a year and apologize if this has been thoroughly discussed.
Mark
R. J., Mecher, C. E., & Lipsitch, M. (2007). Public health interventions and epidemic intensity during the 1918 influenza pandemic.
Proceedings of the National Academy of Sciences,
104(18), 7582-7587. Retrieved at
https://www.pnas.org/content/104/18/7582?__ac_lkid=f639-efd2-f4de-3e717151efc501------------------------------
Mark Eakin
Distinguished Teaching Professor
University of Texas at Arlington
------------------------------