There are tests that can show if you have a current infection and tests that show if you have already had a COVID-19 infection and have developed antibodies.
PCR-tests and rapid antigen tests show if you have an active COVID-19 infection. The PCR test is used today on a large scale. It detects the virus’s genetic material. An antigen test shows if there are viral proteins in the sample.
An antibody test shows if a person has previously been infected with COVID-19 and has developed antibodies in response to the virus. An antibody test is taken 2–3 weeks after falling ill. We recommend that antibody tests be taken by health care providers.
Read more about when to get tested at COVID-19 and testing.