In this episode Lewis First, MD, MS, FAAP, editor-in-chief of Pediatrics, is back for "First Up." He offers an overview of the March issue of the journal. David Hill, MD, FAAP, and Joanna Parga-Belinkie, MD, FAAP, also speak to Doctor Sean O'Leary, MD, MPH, FAAP, chair of the AAP Committee on Infectious Diseases, about the emerging measles crisis in the U.S. and the 2025 vaccine schedule. For resources go to aap.org/podcast.