Did Pa.’s exposure notification apps help prevent the spread of COVID-19?
"We were building the plane while we were flying it,” said one consultant.
1 year ago
Nurses with ChristianaCare wait for the next person to be tested for coronavirus during a free drive-through area at the Riverfront complex in downtown Wilmington, Delaware on Friday, March 13, 2020. (Butch Comegys for WHYY)