@__philipn__ @apmalong @itshullabalulu Not entirely clear but it looks like as needed to detect transmission with no mitigations:
"The choice of titre was determined by pilot sensitivity experiments with the aim of detecting a strong positive in our control condition (No PPE, no ventilation filtration)"
@__philipn__@apmalong@itshullabalulu不完全清楚，但它看起来像是在没有缓解措施的情况下检测传播所需要的：
“滴度的选择由中试敏感性实验确定，目的是在我们的对照条件下检测强阳性（无PPE，无通气过滤）”