Notably, an increasing trend of person-to-person (P2P) transmission was observed in 2021.
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Characteristics and related factors of waterborne and foodborne infectious disease outbreaks before and after the onset of the COVID-19 pandemic (2017-2021) in the Republic of Korea: a descriptive study.
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The sentences
Regarding viral infections, Group A rotavirus maintained a decreasing trend since 2019, while norovirus had a consistently high incidence each year.