Overview

• Public health agencies in Colorado confirmed their 15th measles case this year in a fully vaccinated adult, tracing exposures on Flatiron Flyer buses and multiple Denver–Boulder venues in early June.
• Boston health authorities identified a measles case in a traveler on June 7–8 and are notifying guests at the Westin Boston Seaport, Museum of Fine Arts and Logan Airport Terminal C.
• Northern Health reports measles is circulating in Wonowon, B.C., with exposures in neighbouring communities including a Fort St. John hospital emergency department between midnight and 4 a.m. on June 2.
• Manitoba officials unveiled four new exposure sites across the province—Boundary Trails Health Centre, Plum Coulee School, Portage District General Hospital and Steinbach QuickCare Clinic—and urge monitoring of symptoms through late June or early July.
• Officials stress the measles vaccine’s 97% effectiveness after two doses and recommend self-isolation for four days following rash onset to prevent further spread.