Kirk Milhoan, a pediatric cardiologist recently appointed as chair of a highly influential federal vaccine committee, questioned the need for immunizing against illnesses like polio in a podcast interview released Thursday. Last month, Health and Human Services Secretary Robert F. Kennedy Jr. appointed Milhoan to be chair of the Advisory Committee on Immunization Practices (ACIP) for the Centers for Disease Control and Prevention (CDC) last month. As you look at polio, we need to not be afraid to consider that we are in a different time now than we were then," he said. "Our sanitation is different, our risk of disease is different and so that those all play into the evaluation of whether this is worthwhile of taking a risk for a vaccine or not."