A human infection with an H5 clade 2.3.2.1a A(H5N1) virus was detected in a sample collected from a child in Khulna Division in April 2025, who recovered from his illness. Genetic sequence data are available in GISAID (E EPI_ISL_19875512; submission date 18 May 2025; Institute of Epidemiology, Disease Control & Research (IEDCR); Virology - National Influenza Centre (NIC)). WHO was notified of this case on 4 May 2025. In March 2025, an avian influenza A(H5N1) outbreak was reported in poultry in the same district (Jessore) where the case resides.
A second human infection with an H5 clade 2.3.2.1a A(H5N1) virus was retrospectively detected in a sample collected from a child in Khulna Division in February 2025, who recovered from his illness, according to genetic sequence data available in GISAID (EPI_ISL_19882255; submission date 26 May 2025; Institute of Epidemiology, Disease Control & Research (IEDCR); Virology - National Influenza Centre (NIC)). WHO was notified of this case on 27 May 2025.