References and Sources
Local COVID-19 Prevalence
The default value is based on active infection data for the U.S. as a whole. State specific information can be found by going to the COVID-19 CDC web-page below.
Some calculation will be required. To get a rate, simply divide the number of active cases by the specific population, and multiply by 100 to get the percentage.
COVID-19 PCR Test Sensitivity
PCR test sensitivity can vary by test type and location. 70% has been chosen as a reasonable estimate for most testing in the United States. Please see the following journal article for more in-depth information.
Variation in False-Negative Rate of Reverse Transcriptase Polymerase Chain Reaction–Based SARS-CoV-2 Tests by Time Since Exposure
COVID-19 & Healthcare Professionals
Numbers from the CDC regarding cases and deaths among healthcare professionals can be found on the web-page below: