Improvements to school ventilation systems and doubling down on disinfection and social distancing measures are not going to be enough. As schools across Pennsylvania and the country gear up for the return of students, the US Centers for Disease Control and Prevention on Tuesday is expected to issue recommendations that everyone in K-12 schools wear a mask, regardless of their vaccination status. Media reports out of the regular updates from the public health government agency were signaling changes to the schools masking guidelines. “New CDC recommendations will say everyone in K-12 schools should wear a mask, regardless of their vaccination...