Dataset from Consistency Study of GSK Biologicals' Measles-mumps-rubella (MMR) Vaccine (209762) (Priorix) Comparing Immunogenicity and Safety to Merck & Co., Inc.'s MMR Vaccine (M-M-R II), in Healthy Children 12 to 15 Months of Age

The purpose of this study is to evaluate consistency in terms of the immune response to three different lots of GSK Biologicals' trivalent MMR vaccine manufactured to target potencies, and compare its immunogenicity to Merck & Co., Inc.'s MMR vaccine, which is approved for use in the United States (US).