Dr. Richard Besser is the former acting director for the CDC, and is currently president of the Robert Wood Johnson Foundation. He’s also a pediatrician. This week, he joins Heidi to answer your biggest questions about vaccines. Dr. Besser explains how vaccines are tested for safety, along with the latest recommendations on the Covid-19 vaccine and pregnancy. Heidi and Dr. Besser also cover the maternal and childhood vaccines you ask about most—from the flu shot, to the TDAP, to the first year of vaccinations for your baby.