The development of vaccines against COVID-19 has played a big role in helping reduce the number of new COVID-19 cases. But the time is approaching when a first dose isn’t enough anymore. Booster shots ...

Antigen tests are one type of rapid test that may help diagnose COVID-19. Some rapid tests can provide results in 15 minutes. But, they may not be as accurate as other types of tests, such as a PCR ...

After a recent COVID-19 exposure, Dr. Christina Astley tested positive on an at-home test—but just barely. The line signifying a positive result was so faint that Astley, an endocrinologist at Boston ...

How much protection do you currently have against COVID-19? The answer depends on so much: whether you’ve already had COVID-19 (and if so, how long ago); whether you’ve been vaccinated (and if so, how ...

The Molecular Pathology team developed COVID-19 testing on the Roche Diagnostics cobas 6800 System in just 19 days. (Wayne Tilcock/UC Davis) In January 2020, Nam Tran and his colleagues in the UC ...

Use this glossary to get familiar with terms often used in coverage of the novel coronavirus, which causes COVID-19. Aerosol: A tiny particle or droplet that’s suspended in the air. Antibody: A ...