Virus clusters at French universities give Europe a lesson

PARIS (AP) — Can mandatory masks offer enough protection in lecture halls so packed that late arrivals have to sit on the floor? That’s what worries many students at the centuries-old Sorbonne University in Paris with the coronavirus on the rebound across France. At least a dozen virus clusters have emerged at overcrowded French universities since campuses and classrooms starting reopening this month. Students share stories online of packed corridors, windowless rooms and bathrooms w