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https://socictopen.socict.org/files/to_import/pdfs/e036d7603ea70454f2d4d8f0d3bdca18.pdf
Abstract Background The emergence of SARS-CoV-2 mutants might lead to European border closures, which impact on trade and result in serious economic losses. In April 2020, similar border closures were observed during the first SARS-CoV-2 wave in East…

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