In this episode, hosts Marla Dalton, PE, CAE, and William Schaffner, MD, talk with Carol J. Baker, MD, a leader in group B Streptococcus prevention and a passionate advocate for maternal immunization to help protect mothers and infants. She shares her perspectives on the most significant changes throughout her career, including the development of vaccines and antivirals as well as the inclusion of pregnant women in clinical trials for vaccines and drugs. As a former competitive swimmer and now a daily walker, she has brought her energy and drive to national leadership positions, including as past president of NFID, as well as former chair of the Advisory Committee on Immunization Practices. NFID presented her with the John P. Utz Leadership Award in 2009 in recognition of her leadership and service to NFID and the field of infectious diseases. She was elected to the National Academy of Medicine in 2019.