Michael Coston
Editor, Senior Moderator
HK CHP: Mainland China Retrospectively Reports 4 More H9N2 Cases - Cambodian H5N1 Update
#18,970
Last week Hong Kong's CHP reported two relatively recent (Sept) cases of human H9N2 infection on the Mainland, making the 20th and 21st cases announced in the last 6 months (since April 2025).
In today's report, Hong Kong adds 4 retrospectively identified cases from last February. Details are unusually scant (even for China), with the only identifiers provided being `an individual' and the month.
Last Friday, I reported on the Cambodia's 16th H5N1 Case of 2025, although there have been persistent reports of a 17th case that may have gone unreported in September.
I've updated my map (see below) to reflect this 17th case.
Unlike the milder North American H5N1 clade 2.3.4.4b virus, this is an older clade 2.3.2.1e, which has proved fatal in nearly 50% of cases reported over the past couple of years and has skewed heavily towards younger (< 18) victims.
https://afludiary.blogspot.com/2025/10/hk-chp-mainland-china-retrospectively.html
#18,970
Last week Hong Kong's CHP reported two relatively recent (Sept) cases of human H9N2 infection on the Mainland, making the 20th and 21st cases announced in the last 6 months (since April 2025).
In the previous 6 month period (Oct 2024 - Apr 2025), China had reported 16 cases.
In today's report, Hong Kong adds 4 retrospectively identified cases from last February. Details are unusually scant (even for China), with the only identifiers provided being `an individual' and the month.
Today's report also adds a small detail on the recent H5N1 cases in Cambodia.
Last Friday, I reported on the Cambodia's 16th H5N1 Case of 2025, although there have been persistent reports of a 17th case that may have gone unreported in September.
According to the chart below, a 14 year-old female from Takeo Province was hospitalized (possibly Sept or early Oct). This case was not included in the most recent WHO report (26 August to 29 September).
I've updated my map (see below) to reflect this 17th case.
Unlike the milder North American H5N1 clade 2.3.4.4b virus, this is an older clade 2.3.2.1e, which has proved fatal in nearly 50% of cases reported over the past couple of years and has skewed heavily towards younger (< 18) victims.
https://afludiary.blogspot.com/2025/10/hk-chp-mainland-china-retrospectively.html
