Sample size and naïve prevalence of seroreactivity over time.

The total number of observations and the number of seroreactive observations per fortnight and per four-week period using a seroreactive threshold of BR value ≥ 1 in the primary study period (and per month in June 2019). This is used to calculate naïve estimates of the prevalence of seroreactivity with exact binomial 95% confidence intervals. Note fortnight 26 of 2019 spans across 15 rather than 14 days.

本数据集收录主要研究周期内，以BR值≥1作为血清反应阳性阈值时，每双周及每四周周期的总观测数与血清反应阳性观测数（2019年6月按月统计）。该数据用于计算血清反应阳性率的朴素估计值，并给出精确二项分布95%置信区间。需注意：2019年第26个双周的时长为15天，而非标准的14天。