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

[Commonground]

Avian Influenza Report

VOLUME 22, NUMBER 2

Reporting period: January 4, 2026 – January 10, 2026 (Week 2)

(Published on January 13, 2026)


Summary

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

of avian influenza A(H5N1). From 2016 to 2025, 0 to 81 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 January 10, 2026), 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 January 10, 2026), 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

https://www.chp.gov.hk/files/pdf/2026_avian_influenza_report_vol22_wk02.pdf

[Commonground]

Avian Influenza Report


VOLUME 22, NUMBER 4

Reporting period: January 18, 2026 – January 24, 2026 (Week 4)

(Published on January 27, 2026)

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 2016 to 2025, 0 to 81 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 January 24, 2026), 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 January 24, 2026), 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 December 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...vol22_wk04.pdf

[Commonground]

Avian Influenza Report

VOLUME 22, NUMBER 5
Reporting period: January 25, 2026 – January 31, 2026 (Week 5)
(Published on February 3, 2026)


Summary

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

of avian influenza A(H5N1). From 2016 to 2025, 0 to 81 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 January 31, 2026), 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 January 31, 2026), 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 February 2026.

Continued: https://www.chp.gov.hk/files/pdf/202...vol22_wk05.pdf