Epidemiological characteristics analysis of varicella in Changzhou City from 2018 to 2022
Objective To analyze the epidemiological characteristics of varicella in Changzhou City,aiming to provide a scientific basis for the prevention and control of varicella.Methods Descriptive epidemiological methods were used to analyze the varicella cases in Changzhou City from 2018 to 2022.Results From 2018 to 2022,a total of 35 402 varicella cases were reported in Changzhou City,with an average annual incidence of 141.96/105.The incidence showed a downward trend from 2020.There was significant difference in the incidence among the five years(x2=8 774.11,P＜0.05).The incidence of varicella in 2022(63.58/105)was significantly lower than that in 2020(124.81/105).The incidence of varicella had an obvious seasonal pattern.There were two peak periods,which were May-July and November-January of the next year.The top three annual reported incidence rates were Xinbei,Tianning,and Zhonglou District.The sex ratio of varicella was 1.13∶1,the reported incidence was slightly higher in males than in females.The highest number and incidence occurred in the age of 5-＜10 years old,who were mainly students,preschool children,and scattered children.A total of 179 varicella public health emergencies were reported,and the number of reports had decreased year by year since 2020.After the implementation of the immunization strategy,the proportion of the second dose increased year by year.The vaccination rate of the first dose and the second dose in the 1-year-old and 4-year-old group increased year by year.Conclusions The decrease of varicella incidence is mainly related to the increase of vaccination rate.The immunization strategy of varicella vaccine in Changzhou City has achieved initial success.Considering that the Changzhou plan is the same as the provincial technical plan,the next step will be to accelerate the implementation of the provincial immunization strategy and maintain high-level vaccination with two doses.
VaricellaEpidemiological characteristicsPublic health emergencyVaccination
NETL
NSTL
万方数据
