Commonground
Senior Moderator
Date: 12/4/25
This weekly report from the New York State Department of Health presents summaries of select ongoing and emerging
infectious disease outbreaks of interest to public health professionals and the public, both globally and in the United States.
The Global Health Update summaries include preliminary and up-to-date data that are publicly available for these events
at the time of posting. Because this report aggregates and summarizes data and information from outside sources, the
quality, accuracy or completeness of that data, and the appropriateness of the methodology used, cannot be guaranteed.
Please refer directly to those sources for any data questions. Because the report includes preliminary information,
subsequent reports may contain updates or revisions to information in prior reports.
Excerpts:
Non-Seasonal Influenza
China – Incident Human Cases Reported from Multiple Provinces (H9N2):
According to data from the Hong Kong Centre for Health Protection (HKCHP), as of December 1, there have been a total
of 14 influenza A(H9N2) cases reported among humans in China during the past 6 months, none of which have been
fatal. On November 18, 2025, 4 incident human H9N2 cases were reported in the Guangxi Zhuang Autonomous Region
(2), Henan Province (1), and Hubei Province (1). Cases reported symptom onset during September (1) and October (3),
were between the ages of 7 months and 12 years, and were exposed to poultry prior to illness onset.
(continued)
United States – Poultry Flock Detections (HPAI); Human Case Update (H5N5):
-snip-
On November 21, 2025, the Washington State Department of Health reported that the Grays Harbor County resident
that was hospitalized and being treated for H5N5 had died. The individual was an older adult with underlying health
conditions that had been hospitalized since early November. They were exposed to backyard poultry flocks at home that
had exposure to wild birds. There have been 15 human avian influenza cases (12 confirmed and 3 probable) reported in
Washington since October 2024, all of which were exposed to poultry or wild birds prior to illness onset.
According to data from the United States CDC, as of November 24, there have been a total of 71 confirmed influenza
A(H5) cases, including 2 deaths (1, 2), and 7 probable H5 cases reported among humans since the beginning of 2024.
Most were exposed during commercial agriculture and related operations involving dairy cattle and poultry. According to
the CDC, the current risk to public health is low. HPAI continues to be detected among livestock (primarily dairy cattle),
wild birds, and other mammals.
On November 24, 2025, the Pan American Health Organization (PAHO) published an Epidemiological Update regarding
influenza A(H5N1) in the Americas. Since 2022, 19 countries in the Americas have reported a cumulative total of 5,136
H5N1 outbreaks, and 5 countries have reported a cumulative total of 75 human H5N1 cases, including 2 deaths.
Sources: USDA (12/03/25), CDC (11/14/25)
... https://globalhealthreports.health....5-12/Global Health Update 12.4.25 - Final.pdf
This weekly report from the New York State Department of Health presents summaries of select ongoing and emerging
infectious disease outbreaks of interest to public health professionals and the public, both globally and in the United States.
The Global Health Update summaries include preliminary and up-to-date data that are publicly available for these events
at the time of posting. Because this report aggregates and summarizes data and information from outside sources, the
quality, accuracy or completeness of that data, and the appropriateness of the methodology used, cannot be guaranteed.
Please refer directly to those sources for any data questions. Because the report includes preliminary information,
subsequent reports may contain updates or revisions to information in prior reports.
Excerpts:
Non-Seasonal Influenza
China – Incident Human Cases Reported from Multiple Provinces (H9N2):
According to data from the Hong Kong Centre for Health Protection (HKCHP), as of December 1, there have been a total
of 14 influenza A(H9N2) cases reported among humans in China during the past 6 months, none of which have been
fatal. On November 18, 2025, 4 incident human H9N2 cases were reported in the Guangxi Zhuang Autonomous Region
(2), Henan Province (1), and Hubei Province (1). Cases reported symptom onset during September (1) and October (3),
were between the ages of 7 months and 12 years, and were exposed to poultry prior to illness onset.
(continued)
United States – Poultry Flock Detections (HPAI); Human Case Update (H5N5):
-snip-
On November 21, 2025, the Washington State Department of Health reported that the Grays Harbor County resident
that was hospitalized and being treated for H5N5 had died. The individual was an older adult with underlying health
conditions that had been hospitalized since early November. They were exposed to backyard poultry flocks at home that
had exposure to wild birds. There have been 15 human avian influenza cases (12 confirmed and 3 probable) reported in
Washington since October 2024, all of which were exposed to poultry or wild birds prior to illness onset.
According to data from the United States CDC, as of November 24, there have been a total of 71 confirmed influenza
A(H5) cases, including 2 deaths (1, 2), and 7 probable H5 cases reported among humans since the beginning of 2024.
Most were exposed during commercial agriculture and related operations involving dairy cattle and poultry. According to
the CDC, the current risk to public health is low. HPAI continues to be detected among livestock (primarily dairy cattle),
wild birds, and other mammals.
On November 24, 2025, the Pan American Health Organization (PAHO) published an Epidemiological Update regarding
influenza A(H5N1) in the Americas. Since 2022, 19 countries in the Americas have reported a cumulative total of 5,136
H5N1 outbreaks, and 5 countries have reported a cumulative total of 75 human H5N1 cases, including 2 deaths.
Sources: USDA (12/03/25), CDC (11/14/25)
... https://globalhealthreports.health....5-12/Global Health Update 12.4.25 - Final.pdf
