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Public health addresses the health of children and youth beginning with optimizing the health of the mother prior to pregnancy,called preconception care; and then focuses on the health of the child and those factors that affect early development during infancy and preschool years.As part of these activities,maternal and family dynamics are highlighted,as well as causes of injuries among children and youth.Obesity reduction is also currently a major prevention effort among children and youth in the US.All of these public health activities are attempting to provide a healthy start for children.In spite of all best efforts,some children will be born with or come to experience disabling conditions.Public health also has a responsibility to encourage the health and well-being of children and youth that live with disabling conditions,as well as providing public health activities that support the families of these children and youth.This paper will provide an overview of public health issues,activities,and emphases related to the primary prevention of birth problems and injuries among the general population,along with a synthesis of activities addressing health promotion and preventing secondary conditions among children and youth living with disabilities and support for their families.