Daniel Mark Wilkerson - Coronavirus & COVID-19

What are the types of coronavirus tests?

Viral or diagnostic test: A viral test can tell you if you are currently infected with the coronavirus that causes COVID-19. This is the test you will receive if your doctor refers you for a COVID-19 test based on your symptoms and other factors.


Early in the pandemic, researchers at Johns Hopkins Medicine developed a screening test that we use, along with other types of viral detection tests, to check for the virus.

Antibody test: An antibody test can show if you were previously exposed to or infected with the virus that causes COVID-19, and if your body has created antibodies in an attempt to defend itself. It takes at least 12 days after exposure for your body to make enough antibodies to show up on a test.



This test helps scientists gather data about how the immune system fights off COVID-19 in recovered patients. We do not yet know if a person with a positive antibody test is protected from getting re-infected with the virus or, if so, how long that protection might last.

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