A man wearing a face mask walks past an entrance sign for Bank underground train station backdropped by the Royal Exchange building in London, Wednesday, March 4, 2020. British authorities laid out plans Tuesday to confront a COVID-19 epidemic, saying that the new coronavirus could spread within weeks from a few dozen confirmed cases to millions of infections, with thousands of people in the U.K. at risk of death. (AP Photo/Matt Dunham)

March 4, 2020