Allegheny County
https://www.alleghenycounty.us/Health-Department/Resources/COVID-19/COVID-19.aspx
University of Pittsburgh
https://www.coronavirus.pitt.edu
PA Dept. of Health
https://www.health.pa.gov/topics/disease/coronavirus/Pages/Coronavirus.aspx
Centers for Disease Control and Prevention
https://www.cdc.gov/coronavirus/2019-ncov/index.html