But that's not really how it works—and a single negative test result isn't a guarantee that you don't have the virus. There are a few different types of COVID-19 tests out there now.

A physician assistant with AltaMed Health Services prepares to test a drive-through patient for COVID-19 at their Bristol Street clinic in Santa Ana, Calif. on April 21, 2020.

To order your last round of free tests (which includes eight rapid COVID tests per household), simply head to COVID.gov/tests or call 1-800-232-0233.

Newer tests on the market include the Intrivo On/Go, the iHealth Covid-19 test and the BD Veritor at-home digital test kit. The InteliSwab test has the longest wait time, at 30 to 40 minutes.

And it can be tricky, if not impossible, to tell what virus has infected you without testing. When — and how — to test Lab P.C.R. tests remain the gold standard of Covid diagnostics.

You’ll be able to order a second round of free COVID-19 tests from the government starting next week, as the US government is increasing the order limit to two test kit packages per household.

The California Department of Public Health released a series of PSAs aimed at younger people in two groups hardest hit by COVID-19: members of the Latino and Black communities.

Substantial decreases in cancer screenings and diagnoses occurred during the first peak of the COVID-19 pandemic across one large U.S. health care system, according to a research letter published ...

As with COVID self-testing, the PSA home kits use test cassettes. You use a lancet (small needle) to prick your finger to get a few drops of blood, put the blood into a pipette and then drip this on ...