T riders probably have nothing to worry about from the woman who had measles

The Boston Public Health Commission says it's focusing its vaccination efforts on people who worked in the same building as a French consulate worker diagnosed with measles - but says anybody who has any concerns should check with their physician to see if their vaccinations are up to date.

Christian Nielsen, a spokesman for the commission, said investigators there don't even know for sure which subway lines the woman rode and added she was last on the T long enough ago that the risk is relatively remote.

"We are focusing on areas that we are certain that the patient frequented while [she was] contagious," he said. That includes the Park Square Building and some health centers, including the Whittier Street Health Center in Roxbury.

Nielsen said the MMR vaccine is cheap and safe and can be administered to anybody except pregnant women and babies under 12 months.