US experts bash EU decision to pause AstraZeneca vaccine; Texas, 'OPEN 100%,' has nation's 3rd-worst vaccination rate: COVID-19 updates John Bacon, Jorge L. Ortiz and Elinor Aspegren, USA TODAY 'COVID-19 didn't take us out': A year of loss and resilience on Navajo Nation Replay Video UP NEXT Duke University, already operating under lockdown to combat a rise in coronavirus infections, on Tuesday reported 231 cases from last week, almost as many as the school had the entire fall semester. "This was the highest number of positive cases reported in a single week," the school said in a statement. "The individuals who tested positive have been placed in isolation, while those identified as potential contacts have been placed in precautionary quarantine."