The MMWR for February 12, 2010 / Vol. 59 / No. 5, includes: Update: Mumps Outbreak — New York and New Jersey, June 2009–January 2010
State and local health departments, in collaboration with CDC, continue to investigate a U.S. mumps outbreak that began in June 2009 at a summer camp in New York. As of January 29, 2010, 1,521 cases had been reported, 97% of which have occurred in members of the same tradition-observant religious community. Among patients for whom vaccination status was reported, 88% had received at least 1 dose of mumps-containing vaccine, and 75% had received 2 doses.
vaccines and global health :: ethics and policy 