Flu Test
How Does the Test Work?
Your doctor will rub a swab just like the cotton swabs in your bathroom, but longer along the back of your throat or up your nose. They’ll seal it in a packet and run a quick test on it themselves, or send it out to a lab.
How Long Does It Take to Get Results?
If your doctor does the test themselves, or they do it in the lab at their office, the answer usually comes back within 15 minutes.
What Does a Test Look For?
It's checking for the virus. Some tests can help your doctor figure out which flu virus you have, influenza A or B.
Are All Tests the Same?
No. The quality of the test depends on the maker, how the test works, and how big a sample of the virus your doctor can collect.
https://www.webmd.com/cold-and-flu/flu-guide/flu-tests-detect-specific-viruses