Health Alert Network (HAN)
CDC’s Health Alert Network (HAN) is CDC’s primary method of sharing cleared information about urgent public health incidents with public information officers; federal, state, territorial, and local public health practitioners; clinicians; and public health laboratories.
CDC’s HAN collaborates with federal, state, territorial, and city/county partners to develop protocols and stakeholder relationships that will ensure a robust interoperable platform for the rapid distribution of public health information.
HAN Archive, Types, and Jurisdictions
Receive HAN Updates
Most Recent HANs
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0324-February 9, 2012
CDC Recommendations for Influenza Antiviral Medications Remain Unchanged -
00323-June 22, 2011
High Number of Reported Measles Cases in the U.S. in 2011 — Linked to Outbreaks Abroad -
00322-June 3, 2011
Notice to Health Care Providers — Shiga Toxin-producing E. coli O104 (STEC O104:H4) Infections in U.S. Travelers Returning from Germany
HAN Outreach
CDC’s HAN is a strong national program, providing vital health information and the infrastructure to support dissemination at state and local levels, and beyond. The vast majority of the state-based HAN programs have over 90% of their populations covered under the umbrella of HAN. The HAN messaging system directly and indirectly transmits Health Alerts, Advisories, Updates, and Info Services to over one million recipients.
HAN Message Types
- Health Alert: provides vital, time-sensitive information for a specific incident or situation; warrants immediate action or attention by health officials, laboratorians, clinicians, and members of the public; and conveys the highest level of importance.Example: HAN00001
- Health Advisory: provides important information for a specific incident or situation; contains recommendations or actionable items to be performed by public health officials, laboratorians, and/or clinicians; may not require immediate action.Example: HAN00316
- Health Update: provides updated information regarding an incident or situation; unlikely to require immediate action.Example: HAN00309
- Info Service:
provides general public health information; unlikely to require immediate action.Example: HAN00319
DISCLAIMER Use of trade names and commercial sources is for identification only and does not imply endorsement by the U.S. Department of Health and Human Services.
Links to non-Federal organizations are provided solely as a service to our users. Links do not constitute an endorsement of any organization by CDC or the Federal Government, and none should be inferred. The CDC is not responsible for the content of the individual organizations.
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Page last updated April 17, 2012
- Content source: CDC Emergency Risk Communication Branch (ERCB), Division of Emergency Operations (DEO), Office of Public Health Preparedness and Response (OPHPR)
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