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KMID : 1143420210140120652
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Public Health Weekly Report
2021 Volume.14 No. 12 p.652 ~ p.663
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Characteristics of Varicella Outbreaks in Korea, 2018-2020
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Kim Eun-Young
Jeong Su-Yeon
Lee Gye-Hee
Song Jeong-Suk
Lee Dong-Han
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Abstract
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Varicella, also known as ‘chicken pox’ is a highly infectious acute disease caused by the varicella zoster virus (VZV). Varicella is a common childhood disease and even with the one-dose vaccination program in Korea, which has been available for 15 years, outbreaks continue to occur even among children with high vaccination rate. The aim of this study was to analyze the characteristics of 774 varicella outbreaks that investigated epidemiologic from 2018 to 2020.
This study used Microsoft Excel to analyze the data from both VZV-positive and VZV-suspected cases; a total of 10,704
cases(774 outbreaks). Findings indicated that the average case per outbreak was 15.3(2018), 12.6(2019) and 7.0(2020).
Outbreaks peaked from March to June and from October to December in all three years. In three years (2018-2020), the
highest number of reported cases occurred in 2018, most outbreaks occurred in elementary school and outbreak periods
were longer in elementary school than in daycare centers and preschools.
This study was meaningful because it was helpful in characterizing varicella outbreaks. However, further study is needed to evaluate epidemiologic characteristics within each outbreak.
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KEYWORD
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Varicella, Varicella-zoster virus, Outbreak, Elementary school
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