Monitoring Prevalence and Persistence of Environmental Contamination by SARS-CoV-2 RNA in a Makeshift Hospital for Asymptomatic and Very Mild COVID-19 Patients oleh Jinyan Yang, Dan Sun, Tingting Xia, Shi Shi, Jijiang Suo, Huihui Kuang, Nana Sun, Hongyan Hu, Zhecheng Zheng, Yang Zhou, Xiaocui Li, Shaojuan Chen, Haiqiang Huang, Zhongqiang Yan