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.
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.