It 's not clear if these cases are linked to the outbreak . Day ##care center to require children in infant rooms to be vaccinated . At least two of the children were not vaccinated against measles , though that was to be expected given their ages , the department said . Since January 1 , at least 100 confirmed cases occurred in 16 states and Canada .
It 's not clear if these cases are linked to the outbreak . Day ##care center to require children in infant rooms to be vaccinated . Since January 1 , at least 100 confirmed cases occurred in 16 states and Canada .