نتایج جستجو برای: haemagglutinin
تعداد نتایج: 1116 فیلتر نتایج به سال:
Recommended vaccine formulation The following strains have been recommended by the World Health Organization (WHO) for the 2012 Southern Hemisphere influenza season, and are the same as the recommendations for the 2011 season: • an A/California/7/2009 (H1N1)-like virus • an A/Perth/16/2009 (H3N2)-like virus • a B/Brisbane/60/2008-like virus. Vaccines should contain 15 μg of each haemagglutinin ...
Novel influenza viruses of the H7N9 subtype have infected 33 and killed nine people in China as of 10 April 2013. Their haemagglutinin (HA) and neuraminidase genes probably originated from Eurasian avian influenza viruses; the remaining genes are closely related to avian H9N2 influenza viruses. Several characteristic amino acid changes in HA and the PB2 RNA polymerase subunit probably facilitat...
With no or low virulence in poultry, avian influenza A(H7N9) virus has caused severe infections in humans. In the current fifth epidemic wave, a highly pathogenic avian influenza (HPAI) H7N9 virus emerged. The insertion of four amino acids (KRTA) at the haemagglutinin (HA) cleavage site enabled trypsin-independent infectivity of this virus. Although maintaining dual receptor-binding preference,...
We report the molecular investigations of a large influenza A(H3N2) outbreak, in a season characterised by sharp increase in influenza admissions since December 2016. Analysis of haemagglutinin (HA) sequences demonstrated co-circulation of multiple clades (3C.3a, 3C.2a and 3C.2a1). Most variants fell into a novel subclade (proposed as 3C.2a2); they possessed four unique amino acid substitutions...
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