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Resources with keywords: clade 2.3.4.4b

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Avian influenza A(H5N1) virus
WHO / Global Influenza Programme

Sporadic H5N1 human infections continue; all linked to direct animal contact. Agricultural research workers, poultry handlers, and veterinary staff conducting field work face the highest occupational risk. Clade 2.3.4.4b dominant globally. Research staff working with live avian influenza virus must comply with FSAP registration requirements (H5N1 is a Select Agent). No sustained human-to-human transmission detected as of 18 May 2026.

keywords: agricultural research workers, clade 2.3.4.4b, FSAP, HCW vaccination, HPAI, influenza B, Influenza Virus, occupational health, pediatric deaths, poultry, select agent, zoonotic influenza

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