Meningococcal quadrivalent CRM-197 conjugate vaccine infant study

Trial description: This safety surveillance study of GlaxoSmithKline's quadrivalent meningococcal ACWY conjugate vaccine (Meningococcal quadrivalent CRM-197) among children 2 months through 23 months of age is a post-marketing study required by the United States Food and Drug Administration.It is an observational study of children 2-23 months of age who receive at least one dose of MenACWY-CRM vaccine at a Kaiser Permanente Southern California facility (KPSC) while enrolled as a KPSC health plan member.The objective of the infant study is to describe medical events that require emergency room visit or hospitalization in 6 months following MenACWY-CRM vaccination in children 2-23 months of age in a health maintenance organization in the United States. Outcomes include medical events that require emergency room visits or hospitalizations in children 2-23 months of age following any dose of MenACWY-CRM vaccination. Events with a history of the same diagnosis prior to the first dose of MenACWY-CRM vaccination will be excluded as a pre-existing condition.