The PCR (which stands for polymerase chain reaction) test looks for genetic material from the virus, while the rapid test looks for viral antigens, a type of protein that's on the surface of the ...

You can order a COVID-19 test online through DoorDash and get same-day delivery. Here's how to do it.

Polymerase chain reaction (PCR) tests are the type that health care facilities or testing labs are most likely to use. They pick up the presence of viral genes.

PCR tests detect the genetic material from the virus, while rapid antigen tests detect specific proteins from the coronavirus. Here is the best time to use each, and how to use them to gather ...

There are three different ways to test for COVID-19: PCR tests, antigen tests and antibody tests. Here are the differences.

New high-tech Covid-19 tests promise better and earlier detection of the virus—similar to a PCR test. WSJ’s Joanna Stern (and her mannequin clone) tried out the Detect Covid-19 Test and Cue ...

Last week, I was about to go on a date, and because I'm severely immunocompromised, we agreed he would take a COVID test using one of my rapid home PCR tests. It was a courtesy—he felt perfectly fine— ...

Home PCR test kits are more expensive than antigen tests, but they're also better at diagnosing COVID-19.

If your schedule permits you to wait a few days for test results, there are several companies in the region offering free PCR tests; most require an appointment.

Medically reviewed by Kate Colby, MPH People with asymptomatic or mild COVID illness generally test negative after nine days, but a polymerase chain reaction (PCR) test can still be positive for up to ...