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Health Alert Network (HAN)

CDC Stacks Public Health Publications

The 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, county, and city partners to develop protocols and stakeholder relationships that will ensure a robust interoperable platform for the rapid distribution of public health information. The items in this collection are archived past alerts. For the most up to date information, go to https://www.cdc.gov/han/index.html.

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  • Medetomidine in the US Illegal Fentanyl Supply Increasing Risk for Overdose and Severe Withdrawal Syndrome April 2 2026 1000 AM ET
    Supporting Files Public Domain
  • New World Screwworm Outbreak Moves into Northern Mexico January 20 2026 1230 PM ET
    Supporting Files Public Domain
  • First Reported Outbreak Caused by Marburg Virus in Ethiopia December 3 2025 1230 PM ET
    Supporting Files Public Domain
  • Ebola Outbreak in the Democratic Republic of the Congo September 18 2025 1200 PM ET
    Supporting Files Public Domain
  • Ongoing Risk of Dengue Virus Infections and Updated Testing Recommendations in the United States MAR 18 2025
    Supporting Files Public Domain
  • Expanding Measles Outbreak in the United States and Guidance for the Upcoming Travel Season March 7 2025 200 PM ET
    Supporting Files Public Domain
  • Ebola Outbreak Caused by Sudan virus in Uganda February 06 2025 1115 AM ET
    Supporting Files Public Domain
  • Accelerated Subtyping of Influenza A in Hospitalized Patients JAN 16 2025
    Supporting Files Public Domain
  • First Case of Clade I Monkeypox Diagnosed in the United States November 18 2024 530 PM ET
    Supporting Files Public Domain
  • Disruptions in Availability of Peritoneal Dialysis and Intravenous Solutions from Baxter International Facility in North Carolina October 12 2024 830 AM ET
    Supporting Files Public Domain
  • First Marburg Virus Disease Outbreak in the Republic of Rwanda October 3 2024 1215 PM ET
    Supporting Files Public Domain
  • Prevention Strategies for Monkeypox including Vaccinating People at Risk via Sexual Exposure for US Travelers Visiting Countries with Clade I Monkeypox Outbreaks September 23 2024 1245 PM ET
    Supporting Files Public Domain
  • Increased Oropouche Virus Activity and Associated Risk to Travelers August 16 2024 400 PM ET
    Supporting Files Public Domain
  • Increase in Human Parvovirus B19 Activity in the United States August 13 2024 230 PM ET
    Supporting Files Public Domain
  • Mpox Caused by HumantoHuman Transmission of Monkeypox Virus in the Democratic Republic of the Congo with Spread to Neighboring Countries August 7 2024 315 PM ET
    Supporting Files Public Domain
  • Disruptions in Availability of Becton Dickinson BD BACTEC Blood Culture Bottles Blood Culture Bottles July 23 2024 245 PM ET
    Retired Supporting Files Public Domain
  • Increased Risk of Dengue Virus Infections in the United States June 25 2024 230 PM ET
    Retired Supporting Files Public Domain
  • Disrupted Access to Prescription Stimulant Medications Could Increase Risk of Injury and Overdose June 13 2024 100 PM ET
    Retired Supporting Files Public Domain
  • Severe Illness Potentially Associated with Consuming Diamond ShruumzTM Brand Chocolate Bars Cones and Gummies June 12 2024 100 PM ET
    Retired Supporting Files Public Domain
  • Meningococcal Disease Cases Linked to Travel to the Kingdom of Saudi Arabia KSA Ensure Pilgrims Are Current on Meningococcal Vaccination May 20 2024 1030 AM ET
    Retired Supporting Files Public Domain
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