A Cluster of Novel Coronavirus Disease 2019 Infections Indicating Person-to-Person Transmission Among Casual Contacts From Social Gatherings: An Outbreak Case-Contact Investigation.
Ye ShenWenjie XuChangwei LiAndreas HandelLeonardo MartinezFeng LingMark H EbellXiaofei FuJinren PanJiangping RenWeiling GuEnfu ChenPublished in: Open forum infectious diseases (2020)
Transmission efficiency among close contacts was higher than among casual contacts; however, transmission from second-generation cases may help spread the virus during the incubation period.