Number and proportion of observations with reactive antibody titre ≥40 by age groups in pre- and post-pandemic samples and difference in proportions between pre- and post-pandemic samples.
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资源简介：
Number and proportion of observations with reactive antibody titre ≥40 by age groups in pre- and post-pandemic samples and difference in proportions between pre- and post-pandemic samples.
创建时间：
2015-12-02
