"The measles virus is currently causing large national and international outbreaks of measles and a lack of vaccination, combined with domestic and international travel, has resulted in the spread of illness,” Dr. Catherine Brown, a Massachusetts state epidemiologist, said in a statement. "Getting vaccinated is the best way to protect yourself from this disease."The infected person also visited Harvard Vanguard Medical Associates in Wellesley on Friday afternoon, Boston 25 News has confirmed.