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NOTE: Federal guidance has not changed on how to test for COVID, and all test kits have specific FDA-approved instructions on how they should be used. This story has been updated to include a recent ...

In addition to being the standard testing method for the diagnosis of COVID-19, the nasopharyngeal swab is also frequently used for the detection of various viruses and bacterial infections. Image ...

A few weeks ago, Perry, who lives in Chicago’s northwest suburbs, started feeling symptoms of what he thought was COVID-19. The 64-year-old and his wife drove from their house to Waukegan to get ...