The Idaho Health Alert Network (HAN) is an automated system designed to rapidly deliver time-critical, health-related information to designated health partners. When a health threat is identified, the Idaho Department of Health and Welfare (IDHW) sends an email or a fax message to district public health departments. District public health departments pass this information on through email or fax to hospitals, clinics, physicians, and other appropriate health care providers. In addition, Idaho HAN will summarize the event and provide background information and guidelines for public health staff and clinicians.