Public health officials confirmed a single case of measles was found in a patient at Massachusetts General Hospital earlier this month.
A spokesperson for Mass General told Boston.com that the patient, who has not been identified, was at MGH on May 5. They said it was an isolated incident and it is not considered a threat.
The Boston Public Health Commission is the lead agency on this case. McKenzie Ridings, a spokesperson for the city public health office, told Boston.com in an email exchange that the patient is not a Boston resident. The department has been in contact with 45 Boston residents who had exposure risk to check the status of their immunity.
To check their immunity status against the measles, public health officials warn that residents should either be up-to-date on their vaccines, be born prior to 1957, or have a blood test to check their immunity against the measles.
Anne Roach, a spokesperson for the Massachusetts Department of Public Health, said there have been eight confirmed cases of measles in the Bay State this year. There were two in 2013, zero in 2012, and 24 in 2011.
According to Ridings at BPHC, the measles case at MGH does not count as a case in Boston, since the individual is not a Boston resident. The last confirmed Boston measles case was in 2013, when MGH alerted officials that hundreds may have been exposed when a confirmed case visited the hospital in August. Before that incident, there were seven measles cases in 2011 and one in 2010.