Hong Kong - Selected CHP Weekly Avian Influenza reports starting week 30, 2025

[Commonground]

VOLUME 21, NUMBER 30

Reporting period: July 20, 2025 – July 26, 2025 (Week 30)

(Published on July 29, 2025)

Summary

Since the previous issue of Avian Influenza Report (AIR), there was one new human case

of avian influenza A(H5N1) from Cambodia reported by its Ministry of Health on July 22,

2025. From 2015 to 2024, 0 to 145 confirmed human cases of avian influenza A(H5N1)

were reported to the World Health Organization (WHO) annually (according to onset

date).*

Since the previous issue of AIR, there were no new human cases of avian influenza

A(H5N6). Since 2014 (as of July 26, 2025), there were 93 human cases of avian influenza

A(H5N6) reported globally and 92 of them occurred in Mainland China. The latest case

was reported on July 24, 2024.

Since the previous issue of AIR, there were no new human cases of avian influenza

A(H7N9). Since March 2013 (as of July 26, 2025), there were a total of 1568 human cases

of avian influenza A(H7N9) reported globally (all were reported in the seven waves

between 2013 and September 2019). The latest case was reported on April 5, 2019.


* Since November 21, 2012, WHO only publishes information on human cases with avian influenza A(H5N1)

infection in “Influenza at human – animal interface: Monthly Risk Assessment Summary”. Only cases of human

infection with H5N1 involved in events that are unusual or associated with potential increased risks will be

reported in Disease Outbreak News. The latest report was published in July 2025.


This week’s highlights

(Sources: World Health Organization (WHO), Overseas health authorities, National Health

Commission (NHC), Mainland health authorities, Ministry of Agriculture of the People’s Republic of

China, Centre for Health Protection (CHP) and World Organisation for Animal Health (WOAH;

Founded as OIE))



Continued: https://www.chp.gov.hk/files/pdf/202...vol21_wk30.pdf

[sharon sanders]

Also please see today's new case that Hong Kong CHP (who is excellent btw) did not have before the above publication:

Cambodia - Male, 26, sick chicken contact, ICU, Siem Reap province

[Commonground]

Summary

Since the previous issue of Avian Influenza Report (AIR), there was one new human case

of avian influenza A(H5N1) from Cambodia reported by its Ministry of Health on August

5, 2025. From 2015 to 2024, 0 to 145 confirmed human cases of avian influenza A(H5N1)

were reported to the World Health Organization (WHO) annually (according to onset

date).*

Since the previous issue of AIR, there were no new human cases of avian influenza

A(H5N6). Since 2014 (as of August 9, 2025), there were 93 human cases of avian

influenza A(H5N6) reported globally and 92 of them occurred in Mainland China. The

latest case was reported on July 24, 2024.

Since the previous issue of AIR, there were no new human cases of avian influenza

A(H7N9). Since March 2013 (as of August 9, 2025), there were a total of 1568 human

cases of avian influenza A(H7N9) reported globally (all were reported in the seven waves

between 2013 and September 2019). The latest case was reported on April 5, 2019.


* Since November 21, 2012, WHO only publishes information on human cases with avian influenza A(H5N1)

infection in “Influenza at human – animal interface: Monthly Risk Assessment Summary”. Only cases of human

infection with H5N1 involved in events that are unusual or associated with potential increased risks will be

reported in Disease Outbreak News. The latest report was published in July 2025.



Continued: https://www.chp.gov.hk/files/pdf/202...vol21_wk32.pdf

[sharon sanders]

Please see:


FluTrackers 2016+ Global H5N1 Human Cases List

Cambodia - H5N1 cases 8,9,10,11, 12, 13, 14, & 15 - Current thru Aug 5th 2025

[Commonground]

Summary

Since the previous issue of Avian Influenza Report (AIR), there were no new human cases

of avian influenza A(H5N1). From 2015 to 2024, 0 to 145 confirmed human cases of

avian influenza A(H5N1) were reported to the World Health Organization (WHO)

annually (according to onset date).*

Since the previous issue of AIR, there were no new human cases of avian influenza

A(H5N6). Since 2014 (as of August 16, 2025), there were 93 human cases of avian

influenza A(H5N6) reported globally and 92 of them occurred in Mainland China. The

latest case was reported on July 24, 2024.

Since the previous issue of AIR, there were no new human cases of avian influenza

A(H7N9). Since March 2013 (as of August 16, 2025), there were a total of 1568 human

cases of avian influenza A(H7N9) reported globally (all were reported in the seven waves

between 2013 and September 2019). The latest case was reported on April 5, 2019.

* Since November 21, 2012, WHO only publishes information on human cases with avian influenza A(H5N1)

infection in “Influenza at human – animal interface: Monthly Risk Assessment Summary”. Only cases of human

infection with H5N1 involved in events that are unusual or associated with potential increased risks will be

reported in Disease Outbreak News. The latest report was published in July 2025.


Continued: https://www.chp.gov.hk/files/pdf/202...vol21_wk33.pdf

[Commonground]

Avian Influenza Report is a weekly report produced by the Surveillance Division of the Communicable Disease Branch of

the Centre for Health Protection. This report highlights global avian influenza activity in humans and birds.

VOLUME 21, NUMBER 35

Reporting period: August 24, 2025 – August 30, 2025 (Week 35)

(Published on September 2, 2025)

Summary

1. 2. 3. Since the previous issue of Avian Influenza Report (AIR), there were no new human cases

of avian influenza A(H5N1). From 2015 to 2024, 0 to 145 confirmed human cases of

avian influenza A(H5N1) were reported to the World Health Organization (WHO)

annually (according to onset date).* The latest case was reported on August 5, 2025.

Since the previous issue of AIR, there were no new human cases of avian influenza

A(H5N6). Since 2014 (as of August 30, 2025), there were 93 human cases of avian

influenza A(H5N6) reported globally and 92 of them occurred in Mainland China. The

latest case was reported on July 24, 2024.

Since the previous issue of AIR, there were no new human cases of avian influenza

A(H7N9). Since March 2013 (as of August 30, 2025), there were a total of 1568 human

cases of avian influenza A(H7N9) reported globally (all were reported in the seven waves

between 2013 and September 2019). The latest case was reported on April 5, 2019.

* Since November 21, 2012, WHO only publishes information on human cases with avian influenza A(H5N1)

infection in “Influenza at human – animal interface: Monthly Risk Assessment Summary”. Only cases of human

infection with H5N1 involved in events that are unusual or associated with potential increased risks will be

reported in Disease Outbreak News. The latest report was published in July 2025.

1This week’s highlights

(Sources: World Health Organization (WHO), Overseas health authorities, National Health

Commission (NHC), Mainland health authorities, Ministry of Agriculture of the People’s Republic of

China, Centre for Health Protection (CHP) and World Organisation for Animal Health (WOAH;

Founded as OIE))



Continued: https://www.chp.gov.hk/files/pdf/202...vol21_wk35.pdf

[Commonground]

VOLUME 21, NUMBER 36

Reporting period: August 31, 2025 – September 6, 2025 (Week 36)

(Published on September 9, 2025)

Summary

1. 2. 3. Since the previous issue of Avian Influenza Report (AIR), there were no new human cases

of avian influenza A(H5N1). From 2015 to 2024, 0 to 145 confirmed human cases of

avian influenza A(H5N1) were reported to the World Health Organization (WHO)

annually (according to onset date).* The latest case was reported on August 5, 2025.

Since the previous issue of AIR, there were no new human cases of avian influenza

A(H5N6). Since 2014 (as of September 6, 2025), there were 93 human cases of avian

influenza A(H5N6) reported globally and 92 of them occurred in Mainland China. The

latest case was reported on July 24, 2024.

Since the previous issue of AIR, there were no new human cases of avian influenza

A(H7N9). Since March 2013 (as of September 6, 2025), there were a total of 1568 human

cases of avian influenza A(H7N9) reported globally (all were reported in the seven waves

between 2013 and September 2019). The latest case was reported on April 5, 2019.

* Since November 21, 2012, WHO only publishes information on human cases with avian influenza A(H5N1)

infection in “Influenza at human – animal interface: Monthly Risk Assessment Summary”. Only cases of human

infection with H5N1 involved in events that are unusual or associated with potential increased risks will be

reported in Disease Outbreak News. The latest report was published in July 2025.


This week’s highlights

(Sources: World Health Organization (WHO), Overseas health authorities, National Health

Commission (NHC), Mainland health authorities, Ministry of Agriculture of the People’s Republic of

China, Centre for Health Protection (CHP) and World Organisation for Animal Health (WOAH;

Founded as OIE))



continued: https://www.chp.gov.hk/files/pdf/202...vol21_wk36.pdf

[Commonground]

VOLUME 21, NUMBER 38

Reporting period: September 14, 2025 – September 20, 2025 (Week 38)

(Published on September 23, 2025)

Summary

Since the previous issue of Avian Influenza Report (AIR), there were no new human cases

of avian influenza A(H5N1). From 2015 to 2024, 0 to 145 confirmed human cases of

avian influenza A(H5N1) were reported to the World Health Organization (WHO)

annually (according to onset date).* The latest case was reported on August 5, 2025.

Since the previous issue of AIR, there were no new human cases of avian influenza

A(H5N6). Since 2014 (as of September 20, 2025), there were 93 human cases of avian

influenza A(H5N6) reported globally and 92 of them occurred in the Chinese Mainland.

The latest case was reported on July 24, 2024.

Since the previous issue of AIR, there were no new human cases of avian influenza

A(H7N9). Since March 2013 (as of September 20, 2025), there were a total of 1568

human cases of avian influenza A(H7N9) reported globally (all were reported in the seven

waves between 2013 and September 2019). The latest case was reported on April 5, 2019.

* Since November 21, 2012, WHO only publishes information on human cases with avian influenza A(H5N1)

infection in “Influenza at human – animal interface: Monthly Risk Assessment Summary”. Only cases of human

infection with H5N1 involved in events that are unusual or associated with potential increased risks will be

reported in Disease Outbreak News. The latest report was published in September 2025.

Continued: https://www.chp.gov.hk/files/pdf/202...vol21_wk38.pdf

[Commonground]

Avian Influenza Report is a weekly report produced by the Surveillance Division of the Communicable Disease Branch of

the Centre for Health Protection. This report highlights global avian influenza activity in humans and birds.

VOLUME 21, NUMBER 43

Reporting period: October 19, 2025 – October 25, 2025 (Week 43)

(Published on October 28, 2025)

Summary

Since the previous issue of Avian Influenza Report (AIR), there were no new human cases

of avian influenza A(H5N1). From 2015 to 2024, 0 to 145 confirmed human cases of

avian influenza A(H5N1) were reported to the WHO annually (according to onset date).*

The latest case was reported on October 16, 2025.

Since the previous issue of AIR, there were no new human cases of avian influenza

A(H5N6). Since 2014 (as of October 25, 2025), there were 93 human cases of avian

influenza A(H5N6) reported globally and 92 of them occurred in the Chinese Mainland.

The latest case was reported on July 24, 2024.

Since the previous issue of AIR, there were no new human cases of avian influenza

A(H7N9). Since March 2013 (as of October 25, 2025), there were a total of 1568 human

cases of avian influenza A(H7N9) reported globally (all were reported in the seven waves

between 2013 and September 2019). The latest case was reported on April 5, 2019.

* Since November 21, 2012, WHO only publishes information on human cases with avian influenza A(H5N1)

infection in “Influenza at human – animal interface: Monthly Risk Assessment Summary”. Only cases of human

infection with H5N1 involved in events that are unusual or associated with potential increased risks will be

reported in Disease Outbreak News. The latest report was published in October 2025.

Continued: https://www.chp.gov.hk/files/pdf/202...vol21_wk43.pdf

[Commonground]

Avian Influenza Report

Reporting period: November 2, 2025 – November 8, 2025 (Week 45)
(Published on November 11, 2025)


Summary

1. 2. 3. Since the previous issue of Avian Influenza Report (AIR), there were no new human cases

of avian influenza A(H5N1). From 2015 to 2024, 0 to 145 confirmed human cases of

avian influenza A(H5N1) were reported to the WHO annually (according to onset date).*

The latest case was reported on October 16, 2025.

Since the previous issue of AIR, there were no new human cases of avian influenza

A(H5N6). Since 2014 (as of November 8, 2025), there were 93 human cases of avian

influenza A(H5N6) reported globally and 92 of them occurred in the Chinese Mainland.

The latest case was reported on July 24, 2024.

Since the previous issue of AIR, there were no new human cases of avian influenza

A(H7N9). Since March 2013 (as of November 8, 2025), there were a total of 1568 human

cases of avian influenza A(H7N9) reported globally (all were reported in the seven waves

between 2013 and September 2019). The latest case was reported on April 5, 2019.

* Since November 21, 2012, WHO only publishes information on human cases with avian influenza A(H5N1)

infection in “Influenza at human – animal interface: Monthly Risk Assessment Summary”. Only cases of human

infection with H5N1 involved in events that are unusual or associated with potential increased risks will be

reported in Disease Outbreak News. The latest report was published in October 2025.

continued: https://www.chp.gov.hk/files/pdf/202...vol21_wk45.pdf

[Commonground]

Avian Influenza Report

VOLUME 21, NUMBER 46
Reporting period: November 9, 2025 – November 15, 2025 (Week 46)
(Published on November 18, 2025)


Summary

Since the previous issue of Avian Influenza Report (AIR), there was one new human case

of avian influenza A(H5N1) from Cambodia reported by its Ministry of Health on

November 15, 2025. From 2015 to 2024, 0 to 145 confirmed human cases of avian

influenza A(H5N1) were reported to the WHO annually (according to onset date).*

Since the previous issue of AIR, there were no new human cases of avian influenza

A(H5N6). Since 2014 (as of November 15, 2025), there were 93 human cases of avian

influenza A(H5N6) reported globally and 92 of them occurred in the Chinese Mainland.

The latest case was reported on July 24, 2024.

Since the previous issue of AIR, there were no new human cases of avian influenza

A(H7N9). Since March 2013 (as of November 15, 2025), there were a total of 1568

human cases of avian influenza A(H7N9) reported globally (all were reported in the seven

waves between 2013 and September 2019). The latest case was reported on April 5, 2019.

* Since November 21, 2012, WHO only publishes information on human cases with avian influenza A(H5N1)

infection in “Influenza at human – animal interface: Monthly Risk Assessment Summary”. Only cases of human

infection with H5N1 involved in events that are unusual or associated with potential increased risks will be

reported in Disease Outbreak News. The latest report was published in October 2025.


Continued: https://www.chp.gov.hk/files/pdf/202...vol21_wk46.pdf

[sharon sanders]

The above report does not include the new H5N5 human case in the United States. Please see:

https://flutrackers.com/forum/forum/united-states/h5n1-tracking-af/washington/1023172-washington-state-h5n1-h5n5-in-humans-2025-26

[Commonground]

Avian Influenza Report

VOLUME 21, NUMBER 47
Reporting period: November 16, 2025 – November 22, 2025 (Week 47)
(Published on November 25, 2025)


Summary

Since the previous issue of Avian Influenza Report (AIR), there were no new human cases

of avian influenza A(H5N1). From 2015 to 2024, 0 to 145 confirmed human cases of

avian influenza A(H5N1) were reported to the World Health Organization (WHO)

annually (according to onset date).* The latest case was reported on November 15, 2025.

Since the previous issue of AIR, there were no new human cases of avian influenza

A(H5N6). Since 2014 (as of November 22, 2025), there were 93 human cases of avian

influenza A(H5N6) reported globally and 92 of them occurred in the Chinese Mainland.

The latest case was reported on July 24, 2024.

Since the previous issue of AIR, there were no new human cases of avian influenza

A(H7N9). Since March 2013 (as of November 22, 2025), there were a total of 1568

human cases of avian influenza A(H7N9) reported globally (all were reported in the seven

waves between 2013 and September 2019). The latest case was reported on April 5, 2019.



continued: https://www.chp.gov.hk/files/pdf/202...vol21_wk47.pdf

[Commonground]

Avian Influenza Report

VOLUME 21, NUMBER 48
Reporting period: November 23, 2025 – November 29, 2025 (Week 48)
(Published on December 2, 2025)


Summary

1. 2. 3. Since the previous issue of Avian Influenza Report (AIR), there were no new human cases

of avian influenza A(H5N1). From 2015 to 2024, 0 to 145 confirmed human cases of

avian influenza A(H5N1) were reported to the World Health Organization (WHO)

annually (according to onset date).* The latest case was reported on November 15, 2025.

Since the previous issue of AIR, there were no new human cases of avian influenza

A(H5N6). Since 2014 (as of November 29, 2025), there were 93 human cases of avian

influenza A(H5N6) reported globally and 92 of them occurred in the Chinese Mainland.

The latest case was reported on July 24, 2024.

Since the previous issue of AIR, there were no new human cases of avian influenza

A(H7N9). Since March 2013 (as of November 29, 2025), there were a total of 1568

human cases of avian influenza A(H7N9) reported globally (all were reported in the seven

waves between 2013 and September 2019). The latest case was reported on April 5, 2019.

* Since November 21, 2012, WHO only publishes information on human cases with avian influenza A(H5N1)
infection in “Influenza at human – animal interface: Monthly Risk Assessment Summary”. Only cases of human
infection with H5N1 involved in events that are unusual or associated with potential increased risks will bereported in Disease Outbreak News. The latest report was published in November 2025.



continued: https://www.chp.gov.hk/files/pdf/202...vol21_wk48.pdf

[Commonground]

Avian Influenza Report

VOLUME 21, NUMBER 50
Reporting period: December 7, 2025 – December 13, 2025 (Week 50)
(Published on December 16, 2025)


Summary

Since the previous issue of Avian Influenza Report (AIR), there were no new human cases

of avian influenza A(H5N1). From 2015 to 2024, 0 to 145 confirmed human cases of

avian influenza A(H5N1) were reported to the World Health Organization (WHO)

annually (according to onset date).* The latest case was reported on November 15, 2025.

Since the previous issue of AIR, there were no new human cases of avian influenza

A(H5N6). Since 2014 (as of December 13, 2025), there were 93 human cases of avian

influenza A(H5N6) reported globally and 92 of them occurred in the Chinese Mainland.

The latest case was reported on July 24, 2024.

Since the previous issue of AIR, there were no new human cases of avian influenza

A(H7N9). Since March 2013 (as of December 13, 2025), there were a total of 1568

human cases of avian influenza A(H7N9) reported globally (all were reported in the seven

waves between 2013 and September 2019). The latest case was reported on April 5, 2019.

* Since November 21, 2012, WHO only publishes information on human cases with avian influenza A(H5N1)infection in “Influenza at human – animal interface: Monthly Risk Assessment Summary”. Only cases of humaninfection with H5N1 involved in events that are unusual or associated with potential increased risks will bereported in Disease Outbreak News. The latest report was published in November 2025.

...https://www.chp.gov.hk/files/pdf/202...vol21_wk50.pdf