5 CONCLUSION
Epidemiological investigation, personnel management, disinfection isolation, training and education and surveillance form a quality management circle of ward managetment based on closed-loop management.11Robert S. Kaplan, David P. Norton. Closed-loop management: from strategy to operations [J]. Harvard business review, 2008;(2): 46-60. By optimizing the personnel management and supplies management, as well as infection control guidelines, we have controlled the source of infection, cut off the transmission route and ensured the normal operation of the ward without any covid-19 case. Only with positive response, can COVID-19 prevention and medical work be in an orderly manner.