A negative result from a COVID test in a medical setting is more accurate than a negative result from an at-home test, ...

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

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.

How long are you going to test positive for COVID after taking a test? Two experts weigh in, and advise on testing and isolation guidelines to follow.

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.

If the repeat test is still negative, and it’s important for you to find out whether you have Covid-19, you could go take a PCR test.

By providing quantitative information about Covid-19 infection, PCR testing can help guide isolation and return to school or work policies.

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.

If that test is also negative and you’re still concerned your symptoms are caused by COVID-19, the FDA suggests either a third rapid test or a PCR test.