安庆市2020年新冠肺炎疫情流行病学分析

Epidemiological analysis of COVID-19 in Anqing City in 2020

目的分析安庆市2020年新冠肺炎疫情流行特征,探讨疫情发生原因。方法采用描述性流行病学方法分析新冠肺炎确诊病例感染来源和聚集性疫情特征。结果2020年安庆市共发现83例新冠肺炎确诊病例,其中输入性病例53例,本地感染30例;安庆市疫情先是以输入性病例快速上升期,后转变为输入性病例和本地感染病例并存的高峰期,2月1日后为疫情缓慢下降期;在疫情的上升期疑似病例诊断为确诊病例占76.92%,在疫情高峰期占50.00%,在疫情下降期占34.00%,经统计学检验差异有统计学意义;密切接触者发病在疫情的上升期、高峰期、下降期分别占到4.43%、2.58%、0.59%,经统计学检验差异有统计学意义。年龄主要在20~60岁之间,武汉输入病例年龄低于本地病例,差异有显著性,职业以农民为主,占36.14%。聚集性疫情以家庭内传播为主,占94.12%(16/17)。结论安庆市新冠肺炎疫情主要为输入性病例和家庭内聚集性疫情为主,聚集性疫情主要发生在疫情的高峰期;在疫情的初期密切接触者发病较高。

Objective To analyze the epidemiological characteristics of COVID-19 in Anqing City in 2020 and explore the causes of the epidemic.Methods Descriptive epidemiological method was used to analyze the infection sources and clustering characteristics of COVID-19 confirmed cases.Results In 2020,83 COVID-19 confirmed cases were found in Anqing City,including 53 imported cases and 30 local infections.The epidemic situation in Anqing City was first in the period of rapid increase of imported cases,then turned into a peak where imported cases and local infections coexist.After February 1 st,the epidemic was slowly decreasing.In the rising period of the epidemic,76.92%of suspected cases were diagnosed as confirmed cases,50.00%in the peak period of the epidemic and 34.00%in the declining period of the epidemic.The difference was statistically significant.The incidence of close contact patients accounted for 4.43%,2.58%and 0.59%respectively in the rising,peak and declining periods of the epidemic situation,and the difference was statistically significant.The age of the patients was mainly between 20 and 60 years old,and the age of Wuhan imported cases was lower than that of local cases,the difference was significant.The occupation was mainly farmers,accounting for 36.14%.The clustered epidemic was mainly spread within the family,accounting for 94.12%(16/17).Conclusion COVID-19 epidemic in Anqing City is mainly imported cases and clusters in families.The clustering epidemic mainly occurred at the peak of the epidemic.In the early stage of the epidemic,the incidence of close contacts was higher.