Updated April 2, 2020. To mask or not to mask, and, if so, how? Plus more evidence – from Iceland this time – that the virus is being spread by people with no symptoms. Ongoing shortages at hospitals and more, mainly from the worlds of science and medicine, about the coronavirus pandemic.

Behind every government announcement, there is an army of epidemiologists predicting how the virus will spread, and how to beat it. Note that this story doesn’t deal specifically with the University of Washington models released yesterday, projecting U.S. infections and deaths from COVID-19 in the coming months. But it does provide insights into how scientists create models.