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Avian Influenza Weekly Update # 1063: 25 September 2026

"From 18 to 24 September 2026, no new case of human infection with avian influenza A(H5N1) virus was reported to WHO in the Western Pacific Region. The last case was reported from Phnom Penh, Cambodia, with symptom onset on 30 June 2026.


From 1 January 2003 to 6 September 2026, a total of 486 cases of human infection with avian influenza A(H5N1) virus have been reported from six countries within the Western Pacific Region (Table 1). Of these cases, 320 were fatal, resulting in a case fatality rate (CFR) of 65.8%."