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

What's the difference between a PCR and a rapid antigen (at-home) test? "The rapid antigen tests detect COVID when people have a high amount of viral particles, whereas the PCR test is an ...

Before taking off on holiday travel, learn how an at-home covid test could help protect you and your family this year.

Warm-weather COVID spikes are often fueled by travel, indoor gatherings and waning immunity, experts at the Johns Hopkins ...

The Biden administration has partnered with Google to help people locate free COVID testing sites. In this photo, a lab technician is working on smears for PCR tests for COVID-19 during the ...

If you need to quickly know whether you have coronavirus, a home test can be a convenient solution. Here’s what experts want you to know regarding buying appropriate tests, safely preparing and ...

They do that with a handy enzyme called reverse-transcriptase. Combine the two techniques and you’ve got RT-PCR. Currently, RT-PCR is the only way to determine if a person has Covid-19.

The COVID-19 tests developed by the Centers for Protection and Disease Control (CDC), as well as those developed in Washington and New York, are PCR tests.

Dr. Matt Binnicker, an expert in the diagnosis of infectious diseases, reviews scenarios where an at-home antigen test is a good option, and when to seek out a lab-based PCR.

A PCR test is considered the gold standard for detecting coronavirus infection after exposure to Covid-19 or while you’re experiencing symptoms. Coronavirus test experts explain why the rapid ...

When used to test for COVID-19, the PCR technique looks for a specific sequence of nucleotides that is unique to the coronavirus, a snippet of RNA that exists nowhere else.