[Calls upon all States:] To ensure the enjoyment of the highest attainable standard of physical and mental health of all children without discrimination, to develop sustainable health systems and social services, to ensure access to such systems and services without discrimination, and to pay particular attention to adequate food and nutrition to prevent disease and malnutrition, to prenatal and post-natal health care, to special needs of adolescents, to reproductive and sexual health and to threats from substance abuse and violence;