Testing

If you think a negative test result means you don't have coronavirus, you could be wrong. It can take days before a new infection shows up on a COVID-19 test.

Backers of a third type of coronavirus test, developed by a Nobel Prize winner using cutting-edge CRISPR technology, say it has the potential to be rapid, accurate and inexpensive.

After struggling to ramp up coronavirus testing, the U.S. can now screen several million people daily, thanks to a growing supply of rapid tests. But the boom comes with a new challenge: keeping track of the results.

A new experiment has found that a $5 rapid COVID-19 test may be nearly as effective as the slower, more complex polymerase chain reaction test.

The coronavirus pandemic may have caused tens of thousands of more deaths than previously thought, according to a report published Monday in the peer-reviewed journal JAMA.

Dr. Joshua M. Sharfstein, professor at the Johns Hopkins Bloomberg School of Public Health, coauthors a piece on the importance of isolation following a COVID-19 diagnosis.

Faster, cheaper coronavirus tests are starting to hit the market, and some experts say these technologies could give the U.S. the ability to adopt a new, more effective testing strategy.

Dr. Megan Collins, Assistant Professor of the Johns Hopkins Berman Institute of Bioethics, on safely reopening schools amid the pandemic.

Johns Hopkins Assistant Professor of Emergency Medicine Lauren Sauer on ongoing coronavirus restrictions and positive new developments in testing and treatments. 

Dr. Megan Collins, Johns Hopkins Berman Institute of Bioethics assistant professor, talks about how to open schools safely.

Nearly two months after federal regulators unveiled rules for at-home coronavirus tests, no company has federal approval to sell these fast and cheap tests, even though the technology is ready.

PCR tests have improved dramatically during the pandemic, and have also gotten easier to perform.