The case study, one of the most detailed looks at how covid-19 moves through communities, shows how one person can set off a chain reaction of infections.
By Ariana Eunjung Cha, Washington Post U.S.
Wed, 04/08/2020 - 2:13am
The case study, one of the most detailed looks at how covid-19 moves through communities, shows how one person can set off a chain reaction of infections.