There are several different types of tests available that you can use to get tested for COVID-19. Two types of tests that are currently available in the U.S. include a polymerase chain reaction (PCR) nasal swab test and a rapid at-home antigen test. PCR tests are the most sensitive and accurate while typically providing results within 24 to 72 hours. However, you must meet with a healthcare provider to receive a PCR test. Alternatively, there are also at-home saliva and nasal swab tests that allow the user to collect the sample at home and mail it to a laboratory, which will conduct a PCR test on it. Rapid at-home antigen tests are faster and less expensive than PCR tests and can provide results in 15 minutes; however, these tests are more likely to produce false-negative results. A false-negative test result occurs when the user has an active COVID-19 infection but the test does not accurately return a positive result.