Journal
CURRENT OPINION IN VIROLOGY
Volume 16, Issue -, Pages 158-163Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.coviro.2016.02.005
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Funding
- USAID Emerging Pandemic Threat programme (EPT)
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Highly pathogenic avian influenza (HPAI) A(H5N1) viruses containing the A/goose/Guangdong/96-like (GD/96) HA genes circulated in birds from four continents in the course of 2015 (Jan to Sept). A new HA Glade, termed 2.3.4.4, emerged around 2010-2011 in China and revealed a novel propensity to reassort with NA subtypes other than N1, unlike dozens of earlier clades. Two subtypes, H5N6 and H5N8, have spread to countries in Asia (H5N6), Europe and North America (H5N8). Infections by clade 2.3.4.4 viruses are characterized by low virulence in poultry and some wild birds, contributing to wide geographical dissemination of the viruses via poultry trade and wild bird migration.
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