Resources with keywords: zoonotic influenza
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.
First peer-reviewed report of H5N5 human infection in a 75-year-old immunocompromised patient. Nasal swab RT-PCR was initially negative; confirmed only via deep sequencing. This has direct implications for laboratory workers: standard influenza diagnostic assays may miss novel subtypes in immunocompromised patients. Biosafety officers should review subtype-specific testing protocols and PPE for novel subtype specimen processing.
Genotype D1.1 H5N1 viruses replicate significantly more efficiently in human nasal epithelium organoids than genotype B3.13. This finding has direct biosafety implications for laboratory workers: D1.1 strains pose greater occupational infection risk and may require enhanced containment measures beyond current BSL-3 enhanced (Ag) standards. Dual-use research of concern (DURC) policies apply. Biosafety officers at labs conducting avian influenza research should review containment adequacy for D1.1 strains.
