The ability to use MHC class II proteins for cell entry could have been one of the reasons why H2N2 influenza viruses emerged as a pandemic virus in Asia back in 1957. This is another good reason ...
Expert Rev Vaccines. 2013;12(9):1085-1094. It became obvious that it was necessary to modify regularly the composition of the vaccine, and that it was necessary to use vaccine strains selected ...
Different combinations of these give rise to the influenza A virus subtypes, including the H1N1, H2N2 and H3N2 subtypes that ...
The researchers also suggest that the seasonal H1N1 flu virus that began circulating after the 1918 pandemic ended (and continued to circulate until supplanted by the 1957 H2N2 pandemic flu) is the ...
and A(H2N2) clade 1 viruses. 1968-1977 (group 2 [G2]; n = 49; mean age, 48.4 years); likely primed by A(H3N2) subtype clade 2 virus. 1978-1997 (group 3 [G3]; n = 40; mean age, 35.1 years), likely ...