Table s2 The median of daily contacts between different personnel categories during the daytime, for all the companies

We randomly selected 11 classes from 4 different companies and conducted a sampling survey to investigate the contact frequency among different categories of individuals. Subsequently, we calculated the median contact frequency.本研究从4家不同企业中随机选取11个类别，开展抽样调研以探究不同类别人群间的联系频次，随后计算得到联系频次的中位数。