We would like to thank the COVID-19 Early Prone Position Study Group members for their efforts: Weidong Zhang, Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, China. Quansheng Gao, Department of Operational Medicine Tianjin Institute of Environmental & Operational Medicine, Tianjin, China. Jiang Xie, Department of Respiratory and Critical Care Medicine, Beijing Anzhen Hospital, Capital Medical University, Beijing, China. Chunguo Jiang, Department of Respiratory and Critical Care Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China. Xinmin Ding, Jie Zhang, Department of Respiratory and Critical Care Medicine, Beijing Shijitan Hospital, Capital Medical University, Beijing, China. Feiping Lu, Wei Chen, Jie Zhen, Department of Critical Care Medicine, Beijing Shijitan Hospital, Capital Medical University, Beijing, China. Ping He, Meng’en Zhu, Department of Geriatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China. Xiaomeng Zhang, Department of Otolaryngologic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China. Xiaodong Yuan, Department of Infectious Disease, Beijing Shijitan Hospital, Capital Medical University, Beijing, China. Rong Tian, Department of Respiratory, Beijing Geriatric Hospital, Beijing, China. Xiaohui Wang, Department of Infectious Diseases, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, China. Nan Zhang, Department of Critical Care Medicine, Beijing Chest Hospital, Capital Medical University, Beijing, China. Jun Guo, Department of Pulmonary and Critical Care Medicine, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, China. Xuelei Zang, Center of Clinical Laboratory Medicine, the first Medical Centre, Chinese PLA General Hospital, Beijing, China. Xidong Ma, Department of Respiratory and Critical Care, the first Medical Centre, Chinese PLA General Hospital, Beijing, China. Zhiqiang Xue, Department of Chest surgery, Chinese PLA General Hospital, Beijing, China.