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.

At-home allergy tests claim to be convenient ways to check for allergies and intolerances. These tests are available online and in many drugstores and pharmacies. Share on Pinterest At-home allergy ...

TUCSON (KVOA)- Some viewers have asked about how long a COVID-19 test sample lives after the sample was taken. Pima County Health Department Director Doctor Theresa Cullen said that a PCR test sample ...

With home testing options increasing more than ever, you now also have the ability to test for kidney function within the comfort of your own home. Learn more about our four best picks for at-home ...

The fastest test being used to diagnose people infected with the coronavirus appears to be the least accurate test now in common use, according to new research obtained by NPR. Researchers at the ...

The image of the real SAR-CoV-2 virus, which causes COVID-19, has become ubiquitous. But creating a fake one could be a crucial part of fighting the pandemic. Credit: Shutterstock / CKA When Dr. Soo ...

A urine specific gravity test compares the density of urine to the density of water. This quick test can help determine how well your kidneys are diluting your urine. A urine test is a painless way ...