“Know your response”. The national health sector response to HIV should be guided by a national strategic planning process that reviews, plans and prioritizes specific interventions and service delivery models that best meet national health needs. HIV programme information (including monitoring and evaluation data) must be linked to broader health-information systems in order to ensure that robust, current and accurate information is gathered on national responses to HIV, including the populations accessing services, how services are delivered (for instance, through health facilities, community-based services or other delivery models) and HIV intervention availability and coverage for vulnerable and at-risk populations. WHO,.