All K-12 schools in Pennsylvania are being closed due to concerns about the potential spread of coronavirus, Gov. Tom Wolf’s office said Friday. Schools will remain closed for 10 business days, starting today. At the end of the 10 days, state officials will reevaluate and decide whether continued closure is needed. Wolf’s order — affecting more than 1.7 million children, in public and private schools — came as confirmed cases of COVID-19 in the state leaped from 22 to 33, including the first patient under age 18. He said schools won’t be penalized if they are unable to reach the 180 days of instruction required under state law.