A mumps outbreak has hit the Or Shmuel Yeshiva at Givat Shaul in Jerusalem, according to Yisrael HaYom. Fifteen of the yeshiva's 120 students have already contracted the disease.
The first case was discovered about a month ago, and three weeks later, three more cases were diagnosed. Yeshiva sources said that some of the boys who got ill had been immunized for the disease.
The yeshiva students are aged 13 to 17.