Nov 7, 2024 · This guidance outlines CDC’s recommendations for preventing human exposures to highly pathogenic avian influenza (HPAI) A(H5N1) viruses and infection prevention and control measures, including the use of personal protective equipment, testing, antiviral treatment, patient investigations, monitoring of exposed persons, and antiviral ...

Dec 26, 2024 · Background. This is a technical summary of an analysis of the genomic sequences of the viruses identified in two upper respiratory tract specimens from the patient who was severely ill from an infection with highly pathogenic avian influenza (HPAI) A(H5N1) virus in …

Jan 24, 2025 · The first 2021/2022 detection of Eurasian strain (EA) highly pathogenic avian influenza (HPAI) H5N1 in North America occurred in December 2021 in Newfoundland and Labrador, Canada. Subsequently, HPAI EA H5 and EA H5N1 viruses have been confirmed in wild birds, backyard flocks, commercial poultry facilities, and wild mammals in both Canada and ...

Jun 5, 2024 · A small number of sporadic human cases of highly pathogenic avian influenza (HPAI) A(H5N1) have been identified worldwide since 2022, amidst a panzootic of these viruses in wild birds and poultry.

Dec 31, 2024 · Highly pathogenic avian influenza A (H5N1) viruses have caused widespread infections in dairy cows and poultry in the United States, with sporadic human cases. We describe characteristics of...

Dec 31, 2024 · Highly pathogenic avian influenza A(H5N1) viruses have caused widespread infec-tions in dairy cows and poultry in the United States, with sporadic human cases. We describe characteristics of...

This influenza A found in birds – commonly referred to as avian influenza – is a highly pathogenic strain in birds, which means it causes high rates of death when birds are infected; therefore, it is often referred to as highly pathogenic avian influenza (HPAI).

Sep 1, 2023 · Highly pathogenic avian influenza (HPAI) strains like H5N1 have caused significant outbreaks in birds. Since 2003 to 14 July 2023, the World Health Organization (WHO) has documented 878 cases of HPAI H5N1 infection in humans and …

Since early 2024, highly pathogenic avian influenza (HPAI) H5N1 viruses, which belong to hemagglutinin (HA) clade 2.3.4.4b genotype B3.13, have been causing outbreaks in dairy cattle in the United States.

Jan 17, 2025 · Avian Influenza (H5N1) Animal Infections Background. Bird flu is a disease caused by avian influenza A viruses that usually spread between wild birds, not people. The United States has had an ongoing outbreak of Highly Pathogenic Avian Influenza A (HPAI) H5N1 virus in wild birds since January 2022.