Incidence of influenza virus infections confirmed by serology in children and adult in a suburb community, northern China, 2018-2019 influenza season.
Cuiling XuLing LiuBinzhi RenLibo DongShumei ZouWeijuan HuangHejiang WeiYanhui ChengJing TangRongbao GaoLizhong FengRuifu ZhangChaopu YuanDayan WangJing ChenPublished in: Influenza and other respiratory viruses (2020)
In the community, we identified considerable incidence of seasonal influenza infections. A HI titer of 1:40 could be sufficient to provide 50% protection against influenza A virus infections indicated by serology.