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WASHINGTON, May 4, 2020 � The COVID-19 pandemic has scientists considering a few less-conventional options while vaccines against SARS-CoV-2 are being developed. One option might be the oral polio vaccine. We chatted with one of the researchers proposing the idea � Robert Gallo, M.D. � to understand why a vaccine that hasn’t been used in the U.S. for two decades might provide short-term protection against this new coronavirus: .

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