Coronavirus Daily Digest: May 18 Issue

President Trump says he's taking hydroxychloroquine to prevent coronavirus infection. Early testing of a COVID-19 vaccine from Moderna shows positive results. Lockdown protestors in the U.S. may have accelerated the spread of coronavirus after traveling thousands of miles and across state lines to demonstrations, cell phone data shows. Plus, the major challenge facing the U.S. as it builds an army of contact tracers, and state and federal data on testing don't match up—why?

Coronavirus Daily Digest: May 18 Issue