Rotavirus, a highly contagious virus that causes severe diarrhea and vomiting, used to kill more than half a million children annually. But the introduction of the rotavirus vaccine has slashed that number dramatically, saving hundreds of thousands of lives each year. Joining us in this episode is Paul Offit, MD, a co-inventor of one of the two most widely used rotavirus vaccines worldwide. Dr. Offit is a professor of pediatrics and vaccinology at the University of Pennsylvania and direc...