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 newly updated CDC guidelines don't require testing at the end of isolation because PCR tests can stay positive for up to 12 weeks, CDC Director Dr. Rochelle Walensky told "Good Morning America" on ...

A polymerase chain reaction (PCR) test detects genetic material from a pathogen or abnormal cell sample. Ways of collecting samples include a nasal swab, a saliva swab, or taking a sample of blood.

Share on Pinterest A nasal swab test can be used to determine if a person has COVID-19. Getty Images Tests for COVID-19 include the polymerase chain reaction (PCR) diagnostic test, which is a nasal ...

Soiled-bedding sentinels are not always efficient in detecting pathogens in rodent colonies. In this context, PCR-based testing can be more sensitive and is being advocated as adjunct to traditional ...

This test detects bits of the virus itself and can tell you if you’re currently infected. Swabs are used to collect samples from the mucus membranes in the nose and throat where the virus may be ...

Tokyo — Researchers in Japan announced "game changing" research this week that found simple saliva tests for COVID-19 are just as reliable as the widely used, but more complicated and uncomfortable, ...

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 Health ...

Closing rural diagnostic gap, HealthTrackRx delivers next-morning PCR test results nationwide to improve infection diagnosis and treatment.