New Jersey health officials are asking people who went to last week's Shakira concert at MetLife Stadium to monitor for measles symptoms because a person went to see the singer while infectious.
There is no confirmed outbreak in New Jersey, but the U.S. and North America are seeing high measles activity this year — including hundreds sickened by the highly infectious airborne virus in West Texas — and declining rates of people getting the vaccine, which is 97% effective after two doses.
