Field epidemiological investigation of a varicella outbreak in a school of Nanxun Districtï¼ Huzhou
Journal Title: Shanghai Journal of Preventive Medicine - Year 2022, Vol 34, Issue 12
Abstract
ObjectiveTo determine the epidemiological characteristics and transmission factors of a varicella outbreak in a school in Nanxun District of Huzhou Cityï¼ and assess the effect of prevention and control measuresï¼ which may provide scientific evidence for improvement in the response to varicella outbreak.MethodsData were collected by field epidemiological survey and analyzed by descriptive epidemiology. Statistical analysis was performed by SPSS 22.0 software.ResultsA total of 80 varicella cases were identified in this outbreakï¼ which lasted 68 days. There were four peaks of incidenceï¼ involving 21 classes. The total incidence rate was determined to be 4.14%. Before the public health interventionï¼ some cases were not isolated in timeï¼ which led to the initial spread in the class. After the mid-term examinationï¼ the outbreak further spread to multiple classes. Breakthrough varicella cases accounted for 48.75% of all the cases in the outbreakï¼ among which 94.87% had been vaccinated for more than five years. Howeverï¼ there was no significant difference in the incidence of fever and rash between the breakthrough cases and non-breakthrough casesï¼P>0.05ï¼.ConclusionTimely reportï¼ prompt responseï¼ and strict implementation of prevention and control measures remain crucial for effective containment of varicella outbreak.
Authors and Affiliations
PENG Caiwei,YANG Liping,LIU Binhui,
Keywords
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