In February, an international traveler carrying the measles virus passed through Boston’s busy South Station bus terminal. Once discovered, the Boston Public Health Commission urged anyone in the person’s path who was unvaccinated — other travelers, local residents, bus drivers, station employees — to see their doctors.
“Measles is the most contagious virus we know about,” says H. Cody Meissner, chief of pediatric infectious diseases at Floating Hospital for Children at Tufts Medical Center in Boston. “Hundreds of people could have been exposed.”