Three people in the U.S. have been infected with highly pathogenic avian influenza H5N1 clade 2.3.4.4b this year, all experiencing mild symptoms. The virus, nearly identical to the H5N1 viruses circulating in U.S. dairy cows, is believed to have spread through migratory waterfowl. Published evidence suggests the current outbreak may have originated from a laboratory. The CDC's journal, Emerging Infectious Diseases, confirmed in June 2024 that clade 2.3.4.4b strains were the sole cause of this epizootic.
Out today via @CDCgov's journal, Emerging Infectious Diseases "Here, we report evidence that highly pathogenic avian influenza A(#H5N1) virus strains of clade 2.3.4.4b were the sole cause of this epizootic." https://t.co/JGsDjdhBfE
Proximal Origin of Epidemic Highly Pathogenic Avian Influenza H5N1 Clade 2.3.4.4b and Spread by Migratory Waterfowl[v1] | https://t.co/2ttPpKJLF8 https://t.co/coUwFJaGlb
Proximal Origin of Epidemic Highly Pathogenic Avian Influenza H5N1 Clade 2.3.4.4b and Spread by Migratory Waterfowl[v1] | https://t.co/o5HU4FNQxI Another epic piece @P_McCulloughMD https://t.co/KO3iIYE2MB
BREAKING Publication: Proximal Origin of Epidemic Highly Pathogenic Avian Influenza H5N1 Clade 2.3.4.4b and Spread by Migratory Waterfowl Published evidence suggests current outbreak came from a laboratory "The above circumstances prompted us to pose a question—namely, it is… https://t.co/JZI618dzzY
All three people known to be infected with highly pathogenic avian influenza in the U.S. this year have had mild symptoms. All three known human cases so far involved the 2.3.4.4b lineage of the virus that is nearly identical to the H5N1 viruses circulating in U.S. dairy cows,… https://t.co/WCsdJrTqlp