F.D.A. Approves First Antigen Test for Detecting the Coronavirus
Unlike commonly available coronavirus tests that use polymerase chain reaction, or PCR, antigen diagnostics work by quickly detecting fragments of virus in a sample. The newly approved Quidel test will rely on specimens collected from nasal swabs, according to the F.D.A., and they can only be processed by the company’s lab instruments. “Diagnostic testing is…