The study is based on antibody tests of about 16,000 people conducted between late March and early May.
The updated guidance defines a “close contact” as anyone who spends at least 15 minutes
Companies formulating such tests say they won’t seek emergency authorization from the Food and Drug
The 20-member committee is a mix of physicians, statisticians, vaccine and infectious disease experts along
Christie, who announced he had tested positive on Oct. 3, is one of roughly three