The Alameda County Public Health Department (ACPHD) confirmed one case of measles in an unvaccinated patient in Alameda County in March. This case is linked to an unvaccinated traveler who was exposed in Europe and developed measles after returning home. Physicians are requested to consider measles in patients with a rash and fever, regardless of travel history; prepare their facility for the possibility of patients with measles; report and test suspected measles cases immediately, while the patient is still in your office, in consultation with the ACPHD; confirm immunity of health care staff with unknown vaccination status; and vaccinate children and non-immune adults, unless contraindicated, according to national guidelines. To read the health advisory, go to