The objective of the World Health Organization (WHO) is the attainment by all peoples of the highest possible level of health. Its work in HIV and AIDS is focused on the rapid scale up of treatment and care while accelerating prevention and strengthening health systems so that the health sector response to the epidemic is more effective and comprehensive. WHO defines and develops effective technical norms and guidelines, promotes partnership and provides strategic and technical support to Member States. The Organization also contributes to the global AIDS knowledge base by supporting surveillance, monitoring and evaluation, reviewing the evidence for interventions and promoting the integration of research into health service delivery.