Seemingly sudden appearance of COVID19 across the much of the US Posted on 2020/03/14 by Carl Robitaille This is a thread about how to interpret the seemingly sudden appearance of #COVID19 across the much of the US in the past week with some back-of-the-envelop calculations for number of current infections. 1/13 pic.twitter.com/QbzRbRVheS— Trevor Bedford (@trvrb) March 14, 2020 https://threadreaderapp.com/thread/1238643280679563265.html