https://www.health.pa.gov/topics/disease/coronavirus/Pages/Cases.aspx
From the horse’s mouth. Scroll down and look for the teeny weeny print that tells discerning readers that PA counts probables as new cases...
More here....
https://data.pa.gov/Covid-19/COVID-19-Aggregate-Cases-Current-Daily-County-Heal/j72v-r42c
“Counts include both confirmed and probable cases as defined by the Council of State and Territorial Epidemiologists (CSTE). At present, a person is counted as a case only once....”
At present...?
Okaaaay.....