Type of test

What it tells you

How it’s done

When you’ll get results

What you need to know

PCR test (NAAT, RT-PCR)

If you have a current COVID-19 infection

Detects RNA of the virus

Nose/throat swab; saliva (less common)

1-7 days

Test results are highly accurate

*Best to get tested a few days after possible exposure when virus levels are high enough to test positive

Antigen test 

If you have a current COVID-19 infection

Detects proteins made by the virus

Nose/throat swab

Some may be very fast (15-30 minutes) and can be done in a healthcare provider’s office

Positive results are more reliable, but all test results should be confirmed with a PCR test

Antibody test

If you had a COVID-19 infection in the past and made antibodies to the virus

Blood test

Same day or 1-3 days, depending on test site

It does not show if you currently have COVID-19. A positive test does NOT mean that you are immune to future infections.