Hyle EP, Rao SR, Bangs AC, et al. - In this cross-sectional study, researchers analyzed clinical practice regarding measles-mumps-rubella (MMR) vaccination of pediatric international travelers and detected reasons for non-vaccination of pediatric travelers identified as MMR eligible. Participants in the study were 14,602 pediatric travelers. Data reported that 91.7% of infants, 59.6% of preschool-aged travelers, and 3.2% of school-aged travelers for MMR vaccination were eligible. At the consultation, however, 44.1% of MMR vaccination–eligible infants, 56.5% of MMR vaccination–eligible preschool-aged travelers, and 88.5% of MMR vaccination–eligible school-aged travelers were not vaccinated. The most common reasons for non-vaccination were clinician decision and guardian refusal. Results indicate that clinicians have opportunities to provide US pediatric travelers with pretravel MMR vaccination and that additional clinician and guardian education may be required.