Dr. Marc Siegel answers coronavirus questions from viewers: Do masks work?
Officials confirm 9 coronavirus deaths in U.S.; insight from Fox News contributor Dr. Marc Siegel, professor of medicine at NYU Langone Medical Center.
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Dr. Marc Siegel answers coronavirus questions from viewers: Do masks work?
Officials confirm 9 coronavirus deaths in U.S.; insight from Fox News contributor Dr. Marc Siegel, professor of medicine at NYU Langone Medical Center.