supported by a grant from the National Key R&D Program of China(No.2021YFC2301700);the Ministry of Science and Technology(China)of China(No.2021YFC2302500);the Establishment of a method for detecting neutralizing antibodies with pseudotyped viruses of China Pharmacopeia[grant number 2021S03].
Influenza B viruses(IBVs)primarily infect humans and are a common cause of respiratory infections in humans.Here,to systematically analyze the antigenicity of the IBVs Hemagglutinin(HA)protein,31 B/Victoria and 19 B/Y...