Trends of Hepatitis A Virus Infection in Poland: Assessing the Potential Impact of the COVID-19 Pandemic and War in Ukraine.

In the pre-pandemic period, an increasing trend in hepatitis A notifications was generally noted in Europe, with clustered outbreaks in MSM noted in 2017 [ 44 , 45 ].

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However, in recent years, an unfavorable trend has been outlined, with hepatitis A continuing to occur in hyperendemic regions and emerging in areas of low endemicity [ 7 ].

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In the second trend, there was an increase that did not reach statistical significance, while in the third trend after 2018, there was a pronounced decreasing trend (APC 2018–2022 −60.9%, p trend < 0.05).

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