Polymerase chain reaction (PCR) and rapid (antigen) tests for COVID-19 both involve taking a swab. Results for a PCR test take longer, as it needs to go to a laboratory. It is more costly but tends to ...

The No. 1 national strategy for bringing the coronavirus pandemic to heel is vaccinations, but the federal government wants to see more robust testing for COVID-19, as well. Bethlehem-based OraSure ...

Other countries are awash in Covid tests. The U.S. is not. By David Leonhardt Your daughter wakes up with a scratchy throat, and you can’t decide whether she should go to school. You can’t shake a ...

Vaccines have become the most important weapon in the fight against the COVID-19 pandemic, but antibody levels after vaccination decay quickly over time. Therefore, an accurate and affordable antibody ...

Dr. Mina is a professor of epidemiology and immunology & infectious diseases at the Harvard T.H. Chan School of Public Health. Dr. Phillips is vice president of science and strategy at the Covid ...