Lulu Garcia-Navarro speaks to Rachel Moran, a researcher at University of Washington about Dr. Joseph Mercola, who experts claim has spread misinformation about COVID-19.Health A Doctor Is One of the Most Influential Voices in Vaccine Malinformation. Listen 5:13 NPR's Lulu GarciaNavarro speaks to Rachel Moran, a researcher at University of Washington about Dr. Joseph Mercola, who experts claim has been spreading misinformation regarding COVID-19. NPR is grateful to our sponsors. Become a NPR sponsor