Fatal H5N1 case in Mexico linked to D1.1 genotype
19 April, 2025
The WHO reports that a 3-year-old girl from Durango State, infected with H5N1, developed illness on March 7 without any underlying health conditions. She was hospitalized six days later with respiratory failure, transferred to a tertiary care center, and died on April 8 from respiratory complications. PCR testing on April 1 confirmed H5N1 infection. Genetic sequencing identified the virus as clade 2.3.4.4b, genotype D1.1, consistent with strains causing severe infections in the United States and British Columbia, Canada.
