COVID-19 testing: What you need to know

Antigen test

An antigen test detects proteins on the surface of the virus called antigens.

Antigen tests provide rapid results, typically within 15-30 minutes, and can be done at home. They are less sensitive to active COVID-19 virus than a PCR test. During times when there are a lot of people with COVID-19 (like this omicron surge), a positive antigen test is very likely to be COVID-19, but a negative antigen test is less reassuring since false negative results are more common with antigen tests.

Antigen tests are most accurate when used within a few days of the start of symptoms or at least 5 days after exposure. This is the timeframe when the largest amount of virus is present in your body.

Polymerase chain reaction (PCR) test

A PCR test detects the presence of the actual virus’s genetic material. These tests can be collected through a nasal or saliva test. PCR is the most reliable and most accurate type of COVID-19 test.

A PCR test is analyzed by a medical professional and can take several days to get a result. UI Hospitals & Clinics provides COVID-19 results within 24-36 hours.

If you need a COVID-19 test, complete our MyChart self-checker to determine your next steps.

In general, COVID-19 tests are available at the following locations.

Health care providers:

Most health care providers, including UI Health Care, provide PCR tests.

Test Iowa:

Test Iowa kits provide free of charge saliva PCR tests to the community at multiple locations including UI QuickCare and UI Urgent Care clinics. 

Antigen tests:

At-home antigen tests are available online or at local pharmacies. Households can order up to four COVID-19 tests free of charge online. These tests will be shipped to you through the U.S. Postal Service.

Local pharmacies:

Local pharmacies may have at-home antigen tests and/or Test Iowa kits available for pick-up.