You can order a COVID-19 test online through DoorDash and get same-day delivery. Here's how to do it.

Currently available COVID-19 tests, including PCR tests, are designed to detect any version of SARS-CoV-2, and are not specific for different variants. When should I use an at-home test?

PCR tests are more accurate than the other type of COVID-19 test, called an antigen test. You can do PCR tests at home.

The PCR test currently used to test for COVID-19 was, indeed, created for that use. It's not a vaccine in disguise.

The point-of-care tests are a fast and cheap, though less accurate, way of detecting the virus compared to sending nasal swabs to a lab.

If a rapid test produces a negative result but you have a cough, fever or other symptoms, the CDC recommends you also do a PCR test.

Infectious disease expert Dr. Mark Kortepeter explains the pros and cons of at-home Covid diagnostic tests and how to interpret the results.

Real-time RT-PCR tests can't tell if you've had COVID-19 in the past (blood tests that search for the presence of coronavirus antibodies do that).