Oz COVID-19 Headquarters: The Biggest COVID Debates: What Does It Really Mean to Have Immunity? The Dr. Oz Show : Season 12 Episode 15

We tackle your biggest questions about immunity: If you have it, how long does it last? Can you be infected twice? What does "herd immunity" mean? Plus, Gabrielle Union on handling the new normal, PTSD, motherhood, and her new passion.