CNN CNN Newsroom Live December 23, 2021 07:31:00
Can return results in as little as 15 minutes. >> the antigen test, the rapid at home test is the right thing to do if you want a rapid time sensitive assessment of whether or not you are infectious right before you go into a gathering. >> reporter: and there are antibody tests which can indicate if you have some protection from a previous covid-19 infection or vaccine. one expert says no matter what kind of tests you want to take because of the test kit shortage it's important to make your test count. if you have just one test available -- >> if you feel symptoms, come on, don't -- don't use ...