Two recent cases of potential measles in Baltimore, each of which proved to be negative after lab testing, serve as a reminder and a call to action to ensure children are vaccinated against preventable diseases. At an immunization clinic at the city’s Eastern Health Clinic today, Mayor Stephanie Rawlings-Blake, Health Commissioner Dr. Leana Wen and Karl Perry, Chief School Supports Officer for the Baltimore City Public Schools, reminded parents and caregivers that students must have all required state immunizations in order to participate in school, which opens next Monday, August 31.