H5N1 Update: Two Human H5N1 Cases in Cambodia

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February 28, 2023

Influenza (Flu)

H5N1 Updates

H5N1 Update: Two Human H5N1 Cases in Cambodia

CDC is supporting the Cambodian Ministry of Health in an investigation around two human infections with H5N1 bird flu virus that are thought to be a result of exposure to infected birds/poultry. These H5N1 viruses are different from H5N1 viruses currently circulating in wild birds and poultry in the United States and many other countries.

More Information 
  • The Cambodian Ministry of Health is investigating two human cases of H5N1 with support from in-country CDC staff and a CDC rapid response team. 
  • Investigation efforts include contact tracing, monitoring and/or testing of close contacts including health care workers who cared for the two patients, and testing of animals in the village.
  • To date, no indication of person-to-person spread has been found and there is no indication that these two human cases of H5N1 in Cambodia pose a threat to the U.S. public.
  • In the U.S., the current risk to the general public from bird flu viruses circulating in this country remains low; however, risk depends on exposure, and people with more exposure might have a greater risk of infection. People who have job-related or recreational exposures to infected birds or sick or dead mammals are at higher risk of infection and should take appropriate prevention measures.
  • CDC will continue to provide further updates to the situation and update guidance as needed.

Twitter @CDCFlu

This weekend CDC posted information about two human #H5N1 (bird flu) virus infections reported in Cambodia. CDC is supporting the Cambodian Ministry of Health as they investigate and respond to the situation. Learn more here: https://bit.ly/3mcyaVa

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