JAMA Pediatr

Importance:The United States is experiencing a resurgence of measles, with more than 1000 cases in the first six months of 2019. Imported measles cases among returning international travelers are the source of most US measles outbreaks, and such importations can be reduced with pretravel measles-mumps-rubella (MMR) vaccination. Although children account for less than 10% of US international travelers, pediatric travelers account for almost half of all measles importations.Objective:To examine clinical practice regarding MMR vaccination of pediatric international travelers and to identify reasons for nonvaccination of those identified as MMR-eligible.Design:Observational study (2009\u20132018).Setting:29 sites associated with Global TravEpiNet (GTEN), a Centers for Disease Control and Prevention-supported consortium of clinical sites that provide pretravel consultations.Participants:Pediatric travelers ( 656 months and <18 years of age) attending pretravel consultation.Main Outcomes:MMR vaccination among MMR-eligible pediatric travelers.Results:Of 14 602 pretravel consultations for pediatric international travelers, 2864 travelers (20%) were eligible to receive pretravel MMR vaccination at the time of the consultation: 365 of 398 (92%) infants (6 to <12 months), 2161 of 3623 (60%) preschool-aged travelers (1 to <6 years), and 338 of 10 581 (3%) school-aged travelers (6 to