Measles in Boston

The Boston Metro reports that measles has broken out in the Hancock Tower:

Three people who work in the John Hancock Tower have been stricken with the highly-contagious measles, according to the Boston Public Health Commission.
All of the employess work for the same company and public health authorities have been working with officials there to try to identify co-workers who have been exposed to the measles. A second round of vaccinations are being offered to employees who are uncertain whether or not they were vaccinated in the past.