An essay about masking during the pandemics in America, including COVID-19 and the 1919 Influenza Pandemic.
A note from the authors: "This essay builds upon research conducted in spring and summer 2020 in response to the Covid-19 crisis. A complete list of peer reviewed publications is available from the project website. We are posting this essay on our website, as a non-peer reviewed post, because of the urgency of bringing these lessons to public attention as American higher education resumes operations in late August and early September. This essay may be updated as events continue to evolve. This essay was first posted on August 21, 2020."