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

Only a single PCR test is required by comparison. If you need testing more quickly, there are other programs offering free or low-cost tests, including community-based testing sites.

In general, rapid antigen tests are less sensitive and therefore less likely to detect an infection compared with polymerase chain reaction (PCR) tests. PCR tests look for viral genetic material, ...

How long does flu show up on PCR? There is some variation in how long PCR tests take to detect flu. It all depends on the specifics of the sample and the test.

Do you need to test out of isolation? While testing out of isolation is not required, the CDC says those who choose to should use an antigen test and not a PCR test.

How Long Can You Test Positive for COVID-19 Following Infection? When it comes to testing, PCR tests are more likely to continue picking up the virus following infection ...

For the study, scientists examined data on 348 adults newly diagnosed with COVID-19 based on PCR (polymerase chain reaction) testing.

PCR tests, however, are processed in labs and can take 24 to 48 hours to get a result.

At-home tests and the omicron variant When the omicron variant emerged in late November 2021, scientists quickly responded to determine how PCR and rapid tests performed against this new variant.

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.