Epidemiological characteristics of varicella and vaccination status in the cases in Jingâan Districtï¼ Shanghai from 2017 to 2019
Journal Title: Shanghai Journal of Preventive Medicine - Year 2023, Vol 35, Issue 2
Abstract
ObjectiveTo analyze the epidemiological characteristics and the vaccination status of the cases in Jingâan District from 2017 to 2019ï¼ so as to provide reference basis for the strategy of prevention and control of varicella epidemic.MethodsDescriptive epidemiological methods were used to analyze the epidemiological characteristics of varicella in Jingâan District. The differences between the vaccinated group and the unvaccinated group were compared by statistical methods.ResultsA total of 2 508 cases of varicella were reported with an average annual incidence of 78.7/105 from 2017 to 2019. There was no significant difference in the incidence among the three yearsï¼Ï2=5.535ï¼P=0.063ï¼. There were 1 308 males and 1 200 femalesï¼ and sex ratio was 1.1â¶1. The highest incidence occurred in the age group from 5 to 9 years old ï¼562 casesï¼ 479.3/105ï¼. Two annual peaks occured in May and November. The incidence in the aged 18 and below decreased year by year. There was significant difference in the proportion among the three yearsï¼Ï2=78.129ï¼ P<0.001ï¼. The median interval from vaccination to onset was 5 years among the vaccinated cases. There was significant difference in the cases who received two doses of vaccine in three yearsï¼Ï2=90.902ï¼ P<0.001ï¼.ConclusionWe should strengthen the monitoring system and pay more attention to the epidemiological characteristics of varicella. The protective efficacy of two-doses vaccine needs to be systematically evaluated.
Authors and Affiliations
ZHANG Xiaojuan,QUAN Li,AO Jianjun,HUA Ruijue,HUANG Jin,
Keywords
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