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.
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.
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.