Eighty-five percent of children in a NICU were affected by a rotavirus outbreak, and of the 22 who met the standard for infection, 15 were unvaccinated, researchers reported in the Journal of the Pediatric Infectious Diseases Society. The CDC's Advisory Committee on Immunization Practices guidance advises against rotavirus immunization for NICU infants, and recommends first vaccine doses occur before 15 weeks of age, leaving some children in the NICU ineligible for vaccination under the guidance, and thus unprotected. An accompanying editorial calls for the age limits to be relaxed.