How to reduce the exposure risk of medical staff from SARS-CoV-2 by reducing environmental contamination: Experience from designated hospitals in China oleh Cui Zeng, Cui Zeng, Cui Zeng, Cui Zeng, Hengzhuo Liu, Yuling Jiang, Yuanyu Fu, Yuan Liu, Wei Chang, Tingting Li, Xun Huang, Xun Huang, Chunhui Li, Chunhui Li