Health Alert Network (HAN)

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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, tribal, and local public health practitioners; clinicians; and public health laboratories.

CDC’s HAN collaborates with federal, state, territorial, tribal, 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.

Latest News from Health Alert Network

Health Alert Network (HAN) No. 452 – Guidance for Clinicians Caring for Individuals Recently Evacuated from Afghanistan
09/20/2021 3:45 PM


Health Alert Network (HAN) No. 451 – Increases in Availability of Cannabis Products Containing Delta-8 THC and Reported Cases of Adverse Events
09/14/2021 10:00 AM


Health Alert Network (HAN) No. 450 – Hurricane Ida—Clinical Guidance for Carbon Monoxide (CO) Poisoning
08/28/2021 9:00 AM


Health Alert Network (HAN) No. 449 – Rapid Increase in Ivermectin Prescriptions and Reports of Severe Illness Associated with Use of Products Containing Ivermectin to Prevent or Treat COVID-19
08/26/2021 11:40 AM


Health Alert Network (HAN) No. 448 – New Case Identified: Multistate Investigation of Non-travel Associated Burkholderia pseudomallei Infections (Melioidosis) in Four Patients: Georgia, Kansas, Minnesota, and Texas—2021
08/09/2021 11:40 AM


Health Alert Network (HAN) No. 447 – Vaccination to Prevent COVID-19 Outbreaks with Current and Emergent Variants — United States, 2021
07/27/2021 4:00 PM


Health Alert Network (HAN) No. 446 – Potential Exposure to Person with Confirmed Human Monkeypox Infection — United States, 2021
07/17/2021 5:00 PM


Health Alert Network (HAN) No. 445 – Recall of LeadCare® Blood Lead Tests Due to Risk of Falsely Low Results
07/06/2021 12:00 PM


Health Alert Network (HAN) No. 444 – Multistate Investigation of Non-travel Associated Burkholderia pseudomallei Infections (Melioidosis) in Three Patients: Kansas, Texas, and Minnesota—2021
06/30/2021 2:30 PM


Health Alert Network (HAN) No. 443 – Increased Interseasonal Respiratory Syncytial Virus (RSV) Activity in Parts of the Southern United States
06/10/2021 1:30 PM


Health Alert Network (HAN) No. 442 – Cases of Cerebral Venous Sinus Thrombosis with Thrombocytopenia after Receipt of the Johnson & Johnson COVID-19 Vaccine
04/13/2021 1:00 PM


Health Alert Network (HAN) No. 441 – Acute Non-Viral Hepatitis of Unknown Etiology Potentially Associated with an Alkaline Water Product
03/31/2021 4:00 PM


Health Alert Network (HAN) No. 440 – 2021 Winter Storms—Clinical Guidance for Carbon Monoxide (CO) Poisoning
02/17/2021 2:15 PM


Health Alert Network (HAN) No. 439 – Extensively Drug-ResistantSalmonella Typhi Infections Among U.S. Residents Without International Travel
02/12/2021 1:00 PM

Latest News from Health Alert Network

Health Alert Network (HAN) No. 427 – Update and Interim Guidance on Outbreak of 2019 Novel Coronavirus (2019-nCoV)
02/01/2020 9:00 AM

Health Alert Network (HAN) No. 426 – Update and Interim Guidance on Outbreak of 2019 Novel Coronavirus (2019-nCoV) in Wuhan, China
01/17/2020 8:30 PM

Health Alert Network (HAN) No. 425 – Elevated Influenza Activity: Influenza B/Victoria and A(H1N1)pdm09 Viruses are the Predominant Viruses
01/10/2020 11:40 AM

Health Alert Network (HAN) No. 424 – Outbreak of Pneumonia of Unknown Etiology (PUE) in Wuhan, China
01/08/2020 4:15 PM

Health Alert Network (HAN) No. 423 – Guidance for Using Rapid Diagnostic Tests for Ebola in the United States
12/16/2019 2:00 PM

Health Alert Network (HAN) No. 422 – Hot Tub Displays and Legionella Risk—Guidance for Environmental and Public Health Practitioners
11/15/2019 2:30 PM

Health Alert Network (HAN) No. 421 – Severe Pulmonary Disease Associated with Using E-Cigarette Products
8/30/2019 9:35 AM

Health Alert Network (HAN) No. 420 – Nationwide Shortage of Tuberculin Skin Test Antigens: CDC Recommendations for Patient Care and Public Health Practice
6/6/2019 11:30 AM

Health Alert Network (HAN) No. 419 – Influenza Season Continues with an Increase in Influenza A(H3N2) Activity 3/28/2019 2:15 PM

Health Alert Network (HAN) No. 418 – Update: Widespread Outbreaks of Hepatitis A among People Who Use Drugs and People Experiencing Homelessness across the United States 3/25/2019 1:30 PM

Health Alert Network (HAN) No. 417 – Third Case of Rifampin/Penicillin-Resistant Strain of RB51 Brucella from Consuming Raw Milk 1/23/2019 2:30 PM

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.
      
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.
      
Health Update: provides updated information regarding an incident or situation; unlikely to require immediate action.
      
Info Service: provides general public health information; unlikely to require immediate action.

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.

Page last reviewed: January 22, 2020