Antigen tests: the coronavirus 'breakthrough' that a top White House official says we need

Dr. Deborah Birx, the White House coronavirus response coordinator, says current technology makes it impossible to test every American for coronavirus. The United States, she says, will need a "breakthrough" in testing to screen large numbers of people.

source https://www.cnn.com/2020/04/27/health/antigen-tests-coronavirus-breakthrough/index.html