FILE - In this March 16, 2020, file photo, Neal Browning receives a shot at the Kaiser Permanente Washington Health Research Institute in Seattle, in the first-stage safety study clinical trial of a potential vaccine for COVID-19, the disease caused by the coronavirus. Many world leaders at this week's virtual U.N. summit hope it will be a vaccine made available and affordable to all countries, rich and poor. But with the U.S., China and Russia opting out of a collaborative effort to develop and distribute a vaccine, and some rich nations striking deals with pharmaceutical companies to secure millions of potential doses, the U.N. pleas are plentiful but likely in vain. (AP Photo/Ted S. Warren, File)
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