A polymerase chain reaction (PCR) test can be positive for up to 90 days after infection. The discrepancies between tests and ...

However, people who've had COVID-19 may continue to test positive on PCR tests for up to 90 days, so it may be difficult to ...

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Thus, the sensitivity of the test was 55% and the specificity 100% (81% if positive PCR tests among undiagnosed patients are considered as false positive results). CONCLUSION PCR applied to whole ...

Covid testing rules are to be eased for people without symptoms, who will no longer need to confirm a positive lateral flow test with a PCR. While Covid levels are high, people can be confident ...

Four medical professionals with COVID-19 who met the criteria for hospital release or lifting of quarantine in China had positive real-time reverse transcriptase-polymerase chain reaction (RT-PCR) ...

And when it comes to PCR tests, people may test positive for even longer, Dr Alberto Paniz-Mondolfi, associate professor of pathology, molecular and cell-based medicine at the Icahn School of Medicine ...

Norman Regional Health System is alerting the community tonight about a surge they say they're seeing in flu and RSV cases.

The proportion of positive RAT (59.0%) and RT-PCR (83.0%) results peaked 3 days after symptom onset ... this pattern suggests that positive antigen test results could indicate transmissible virus; ...

You do not need to confirm a positive rapid antigen test with a PCR test. Please see below for important information about taking at-home self-collected rapid antigen tests. Polymerase chain reaction ...