Frequently Asked Questions: Calculating Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) RT-PCR Laboratory Test Percent Positivity




To reduce the percent positivity, a community can work to reduce the coronavirus transmission. For a comprehensive list of CDC recommendations for prevention of COVID-19 transmission, visit CDC’s summary of guidance.

A community can also do more testing. When there is a positive test, make sure that isolation of infected persons is done to limit further transmission. Other prevention measures also help such as wearing a mask, washing hands frequently, social distancing, avoiding large gatherings, and cleaning and disinfecting commonly used surfaces regularly.

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