WASHINGTON - The Food and Drug Administration, under fire for allowing more than 100 commercial coronavirus antibody tests on the market without review, moved Monday to assert oversight, saying the tests will have to pass agency muster, including meeting standards for quality and accuracy.

BERLIN - At a laboratory in Berlin, technicians in green scrubs, goggles and face masks examine a constant flow of swabs from suspected coronavirus patients from across the city. The staff is already working double shifts, from 7 a.m. until about midnight, to meet the unrelenting demand for testing.