Final answer:
Health agencies use the National Notifiable Disease Surveillance System to gather data on disease incidence, with physicians reporting notifiable diseases for public health monitoring. Public health services vary between state and local agencies, with state agencies focusing on broader initiatives and local agencies handling community-specific matters.
Step-by-step explanation:
Health agencies obtain data about the incidence of diseases through the National Notifiable Disease Surveillance System (NNDSS) in conjunction with state and local health departments. This system monitors diseases of public health importance such as HIV, measles, and West Nile virus infections. Physicians are legally mandated to report cases of notifiable diseases, allowing for public health monitoring and response initiatives.
Regarding whether state or local agencies typically provide specific public health services, services listed under state health agency services are typically provided on a statewide level, focusing on broader health initiatives, regulations, and disease tracking. On the other hand, services listed under local services are usually delivered by local health departments dealing with community-specific health matters. By examining the information from pages 11-16 as the question suggests, the delineation between state and local services can be clearer.