Prevalence of HI titre ≥1∶40 after the pandemic by exposure variable (weighted) (n = 1708).

*Totals slightly different from 1708 are explained by a few subjects with missing information for that variable (i.e. 4 subjects with missing information for sex).本数据集的总计值与1708存在小幅差异，该差异可由部分研究对象存在对应变量信息缺失的情况解释，其中4名研究对象缺失了性别变量的相关信息。