There are three different ways to test for COVID-19: PCR tests, antigen tests and antibody tests. Each method is best for a different stage of COVID-19 infection. Used in sequence, all three methods ...

If I am convinced that my patient has COVID and the test comes back negative, we will leave that patient in isolation until we can repeat that RT-PCR test, just to make sure we’re not exposing our ...

Two types of COVID-19 tests, the rapid antigen test and the polymerase chain reaction (PCR) test, are available in the United States. The PCR typically relies on lab testing and is still considered ...

If you had COVID-19 symptoms in 2020, you probably would have masked up and braved a visit to a laboratory, doctor’s office, or clinic to get a polymerase chain reaction (PCR) test. A health care ...

In a recent study posted to the medRxiv* server, a team of researchers investigated how antigen concentration and viral load in different specimen types affected the performance of severe acute ...

A false positive result is possible with a rapid COVID-19 test. It happens when a person does not have COVID-19 but still tests positive for the disease. People can use a rapid COVID-19 test at home ...

A woman squeezing the sample liquid on a test strip while carrying out a Covid-19 rapid self test at home. Testing experts explain the latest data surrounding the accuracy of at-home rapid antigen ...

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.

Nathaniel Hafer receives funding from the National Institutes of Health via awards UL1TR001453 and U54HL143541. Apurv Soni receives funding from the National Institutes of Health via awards ...