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Covid-19 Rapid Test Shows Negative Result not medical advice
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Can a person test negative and later test positive for COVID-19?
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Rapid COVID-19 tests can produce false-negative results and that's why PCR tests are used as well
Estimated 43,000 people could have had false negative Covid PCR test results | ITV News
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"I Have Covid But Tested Negative"--A Doctor Explains False Negatives
