This event will feature Bill Hanage and be hosted by the Harvard T.H. Chan School of Public Health and The World from PRX & GBH. Learn more about the event here. Join here. "The highly infectious COVID-19 Delta variant is spurring global surges, sparking concerns among public health officials. In the U.S., more than 80 percent of new cases are from the Delta variant. What makes this variant so contagious? How protective are…

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