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 current vaccines? What's the latest on practices such as masking and social distancing? Harvard Chan epidemiologist William Hanage and The World's Carolyn Beeler spoke for this online Qu0026A. Presented jointly with The World from PRX u0026 GBH.
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The Coronavirus Pandemic: The Delta Variant Surge
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