Abstract: Objective To investigate and analyze the application effectiveness of prevention and disinfection control in infectious disease outbreaks of public health emergencies. Methods The public health data of 400 different public places (1 342 people surveyed) in Rizhao City, Shandong Province from February 2020 to January 2024 were retrospectively analyzed, and were divided into control group and observation group according to different methods of infectious disease prevention,disinfection control and time.The control group (from February 2020 to April 2022, 198 public places involved, 687 surveyed members of the public) adopted basic infectious disease prevention and disinfection control methods, while the observation group (from May 2022 to January 2024, 1 public places involved 202, 655 members of the public surveyed adopted comprehensive infectious disease prevention and disinfection control methods.The knowledge of prevention and disinfection control of infectious diseases,evaluation index of disinfection effect, incidence of infectious diseases, response time of infectious disease outbreak and success rate of tracing infectious source were compared between the two groups of public. Results The scores of knowledge of infectious diseases,disinfection control knowledge, personal protection knowledge,cognition of disinfection control measures in public places, and mastery of infectious disease outbreak knowledge in the observation group were higher than control group, with statistical significance (P<0.05). The average disinfection time of the observation group was longer than control group, and the average disinfection range of the observation group was higher than control group, with statistical significance (P<0.05). The undetected rate of surface microorganisms in the observation group was higher than control group, and the difference was statistically significant (P<0.05).The incidence of infectious diseases in the observation group was lower than control group,the response time of infectious disease outbreak in the observation group was longer than control group,and the success rate of tracing infection source in the observation group was higher control group,the difference was statistically significant(P<0.05). Conclusion The application of comprehensive infectious disease prevention and disinfection control methods can significantly enhance the public's understanding of infectious disease prevention and disinfection control,obtain better disinfection effectiveness evaluation indicators, as well as reduce the incidence rate of infectious diseases,shorten the response time to infectious disease outbreaks, and increase the success rate of infectious source tracking.

Key words: infectious disease, public health emergency, prevention, disinfection control, outbreak response time