is_manufactured_by has role immunizes against disease immunizes recipient immunizes against pathogen mumps measles rubella Rubella virus Measles morbillivirus Mumps orthorubulavirus Homo sapiens combination vaccine role combination vaccine Measles-Mumps-Rubella vaccine live attenuated viral vaccine Virivac vaccine Virivac A combined live virus vaccine used to prevent measles, mumps, and rubella. http://vacvine.com/Vaccines/Details/319 need better source vaccine live attenuated vaccine role Merck & Co., Inc.