India, April 17 -- New H5N1 D1.1 variant rapidly spread across North America wildlife.

Study finds human infections rare but mutations emerged during infections.

Scientists warn ecological factors and migration aided dominance requiring preparedness.

A new reassortant highly pathogenic genotype of the avian influenza (HPAI) A(H5N1), commonly known as bird flu, has rapidly spread across the US and Canada, underlining the need for pandemic preparedness.

Clade 2.3.4.4b H5N1 virus, which emerged in late 2021, has affected more than 485 bird species and 48 mammal species worldwide. Now, a new study published in Nature Communications highlights that the new reassortant of genotype D1.1 nearly replaced clade 2.3.4.4b in North America by late...