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Understanding WEB H5N2: A Variant of Avian Influenza

Introduction

WEB H5N2 is a subtype of the Influenzavirus A avian influenza virus, commonly known as bird flu. It infects a diverse range of birds, including chickens. In recent news, the world's first laboratory-confirmed human case of the H5N2 bird flu variant emerged, coinciding with the ongoing H5N1 outbreaks in the United States.

Avian Influenza: An Overview

Avian influenza, or bird flu, stems from infection with avian Type A flu viruses. From 2003 to 2022, there have been 863 reported cases of human infection with the AH5N1 virus variant. The most prevalent avian influenza A virus subtypes causing human infections are H5, H7, and H9.

H5 Bird Flu: Global Concerns

H5 bird flu is prevalent among wild birds worldwide, leading to outbreaks in poultry and even dairy cows in the United States. Prior to the confirmation of the H5N2 case, it was unknown if the virus could infect humans. However, avian flu viruses typically do not infect humans.

Heightened Global Activity of HPAI H5N1

Highly pathogenic avian influenza (HPAI) H5N1 activity has intensified worldwide since 2021, causing significant mortality in poultry populations.

AI Viruses and Their Impact on Poultry

Avian influenza (AI) affects poultry, including chickens, turkeys, pheasants, quail, ducks, geese, and guinea fowl.

WHO Announcement Amidst US Outbreak

Despite the ongoing H5N1 flu outbreak in dairy cattle in the United States, the World Health Organization (WHO) announced the first laboratory-confirmed human case of the H5N2 bird flu variant, highlighting the importance of surveillance and preparedness for potential zoonotic transmission. ```