Research on Transmission Chain Analysis and Prevention and Control Based on COVID-19
Controlling the development of the epidemic is an important issue of epidemic prevention and control.Based on the data of the COVID-19 prevention system in a city,this paper deeply discusses the COVID-19 prevention and control strategies at multiple levels.First,an analytical framework of the COVID-19 transmission chain is constructed,which analyzes the transmission mode of the virus,tracks the informants and sub informants of positive people,and deeply analyzes the characteristics of the clustered epidemic,so as to achieve the goal of precise prevention and control.Second,a virus transmission index is established to assess the impact of vaccination shots on virus transmission.The results show that the transmission index decreases with the increase of vaccination shots,which verifies the effectiveness of the vaccine.Finally,for differentiated management and controlling of place,with the flow of people as the entry point,two clustering algorithms are used to identify the key control.The results show that the traffic,residential and other types of places need to be mainly controlled.Entertainment,culture shopping and other venue types require secondary focus control.
novel coronavirustransmission chaintransmission indexmanagement and control of place
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