Emergence of a C-terminal seven-amino-acid elongation of NS1 in around 1950 conferred a minor growth advantage to former seasonal influenza A viruses

Lohrmann F, Dijkman R, Stertz S, Thiel V, Haller O, Staeheli P, Kochs G. Emergence of a C-terminal seven-amino-acid elongation of NS1 in around 1950 conferred a minor growth advantage to former seasonal influenza A viruses. J Virol 2013; 87:11300-3.