PCR is a highly sensitive testing method that detects the RNA of novel coronavirus. It is also able to detect if you are infected with a different strain of the virus. The test is performed by swabbing the throat, and provides the most reliable result. It is up to your doctor to decide whether you should receive a PCR test.
Rapid test, including self-test
A rapid test (also known as an antigen test, quick test, lateral flow test or self-test) is a chemical test used to detect viral proteins in a sample. The rapid test is less sensitive than the PCR test, which means that the result is less reliable. However, the result is ready after only about 15-30 minutes.