Public Health Madison & Dane County

This post was updated on December 18 to reflect new quarantine guidance.

A critical piece in stopping the spread of COVID-19 is being able to test people for the virus. Through testing, we identify the people who have the virus so they can isolate and prevent spreading the disease to others. As of this posting, nearly half of Dane County residents have been tested for COVID-19 at least once. Our county is very fortunate to be one of the few in the country with consistent, accessible COVID-19 testing available to almost everyone, all for free.

What Testing Can Do

• Identify someone with COVID-19 infection on the day they are tested
• Help us begin contact tracing to prevent others from spreading the virus
• Help us prevent large outbreaks in facilities, businesses, workplaces, and schools
• Help us understand how many people in the community have the virus
• Help us identify populations disproportionally affected by COVID-19

What Testing Can’t Do

• Tell us if someone can safely return to work, school, or their daily routine. People must isolate or quarantine before safely returning to activities.  We recommend against requiring employees to have a negative COVID-19 test before returning to work. Some people can still test positive for weeks following their isolation but are no longer infectious. Requiring a negative test places an unnecessary burden on the employee and may prevent you from providing services due to extended employee absences.
• Give someone permission to attend an event or gathering. Again, testing only tells us if someone has COVID-19 on the day they are tested. A negative test does not necessarily mean it is safe to gather with others; someone could be exposed, test negative the next day, then test positive the day after that. Tests cost about $100 each and should not be wasted.
• Serve as a loophole for ignoring precautions. Frequent testing is not a way to avoid taking commonsense precautions like avoiding gathering, wearing a mask, and staying home when you’re sick.
• Stop the pandemic. Testing is one tool in our toolbox for stopping the spread of the virus, but testing alone can’t stop this pandemic. We also need people to follow Public Health orders, recommendations, and precautions to stop the virus in its tracks.

Scenarios: Should I Get Tested?

Test what you’ve learned with these graphics that ask, “Should I get tested?”

What are My Testing Options?

Visit our testing page to learn more about where you can be tested.

Extra Credit: Learn the Types of Tests Available

There are two types of testing available: diagnostic and antibody.

Diagnostic Testing

A diagnostic test shows if you have active coronavirus infection. In other words, it tells us if you have the virus right now. There are two types of diagnostic tests: molecular tests and antigen tests. Molecular tests, more commonly known as PCR tests (this is the test currently available at the Alliant testing site), work by identifying the virus’s genetic material. Antigen tests work by identifying the virus’s unique proteins.

Antibody Testing

When your body fights an infection, it makes antibodies to respond to the threat. An antibody test tells us if your body has ever tried to fight the virus in the past. These tests cannot tell you if you have a current COVID-19 infection.

We love this table from FDA which outlines the differences of the types of testing available: