Scientists try to pinpoint why rapid Covid tests are missing cases
Marianna Parker, a Boston-area pediatrician, wanted to make sure she, her husband, and her toddler didn’t have Covid when they developed a nasty cold around Dec. 18. Over the course of a week she used five Covid rapid tests and took four PCR tests, testing negative. Her husband tested negative on a rapid test on his second day of infection but positive on his sixth, a result that was confirmed via PCR. “If he hadn’t decided to do that random test on Day 6 we would never have known,” she said.
Nevertheless, she’s convinced all three of them had Covid, and that the tests simply produced the wrong results. In a Facebook post, she advised friends to remember that if they are vaccinated, their tests might only be positive for a short period of time.
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