A rapid COVID-19 test is one of several types of COVID-19 tests that are available and is used to detect the presence of protein fragments in the body that are unique to COVID-19. While all types of COVID-19 tests are useful in helping to stop the spread of the virus, this particular test can be particularly useful as a form of screening at workplaces, events and other places where large groups of people will be gathered. A rapid test is named as such due to the quick turnaround of test results, which can be as little as 15 minutes after the test swab was taken.