Researchers have raised many questions about the accuracy of antibody, or serology, tests.
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 6:02 After you get tested, you'll be encouraged to self-isolate until you get results back over the phone though some clinics are able to.
Hahn did not offer a detailed response when asked about the memorandum during a Friday evening news conference of the White House Coronavirus Task Force.
This test can be performed at home or at work.