CRC/C/GC/7/Rev.1 page 12 all children (art. 6), the Committee recommends that States parties take all necessary measures to ensure that all children are registered at birth. This can be achieved through a universal, well-managed registration system that is accessible to all and free of charge. An effective system must be flexible and responsive to the circumstances of families, for example by providing mobile registration units where appropriate. The Committee notes that children who are sick or disabled are less likely to be registered in some regions and emphasizes that all children should be registered at birth, without discrimination of any kind (art. 2). The Committee also reminds States parties of the importance of facilitating late registration of birth, and ensuring that children who have not been registered have equal access to health care, protection, education and other social services. 26. Standard of living and social security. Young children are entitled to a standard of living adequate for their physical, mental, spiritual, moral and social development (art. 27). The Committee notes with concern that even the most basic standard of living is not assured for millions of young children, despite widespread recognition of the adverse consequences of deprivation. Growing up in relative poverty undermines children’s well-being, social inclusion and self-esteem and reduces opportunities for learning and development. Growing up in conditions of absolute poverty has even more serious consequences, threatening children’s survival and their health, as well as undermining the basic quality of life. States parties are urged to implement systematic strategies to reduce poverty in early childhood as well as combat its negative effects on children’s well-being. All possible means should be employed, including “material assistance and support programmes” for children and families (art. 27.3), in order to assure to young children a basic standard of living consistent with rights. Implementing children’s right to benefit from social security, including social insurance, is an important element of any strategy (art. 26). 27. Health-care provision. States parties should ensure that all children have access to the highest attainable standard of health care and nutrition during their early years, in order to reduce infant mortality and enable children to enjoy a healthy start in life (art. 24). In particular: (a) States parties have a responsibility to ensure access to clean drinking water, adequate sanitation, appropriate immunization, good nutrition and medical services, which are essential for young children’s health, as is a stress-free environment. Malnutrition and disease have long-term impacts on children’s physical health and development. They affect children’s mental state, inhibiting learning and social participation and reducing prospects for realizing their potential. The same applies to obesity and unhealthy lifestyles; (b) States parties have a responsibility to implement children’s right to health by encouraging education in child health and development, including about the advantages of breastfeeding, nutrition, hygiene and sanitation.2 Priority should also be given to the provision of appropriate prenatal and post-natal health care for mothers and infants in order to foster healthy family-child relationships, especially between a child and his or her mother (or other primary caregiver) (art. 24.2). Young children are themselves able to contribute to ensuring their personal health and encouraging healthy lifestyles among their peers, for example through participation in appropriate, child-centred health education programmes;