Factors Influencing the Size and Duration of School Varicella Outbreaks in Shanghai, China, in the Era of Voluntary Single-Dose Vaccination.

Open Forum Infect Dis · 2019 · PMC6786505 · PMID 31660368

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an increasing trendno p-value reported

In addition, the proportion of BV cases in school-based outbreaks showed an increasing trend over time [ 1 , 12 ], which is another risk factor for large-scale outbreaks.

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