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Vistula river mouth, and Baltic Sea). The virus was tested at two concentrations (10(4) and 10(6) median tissue culture infective dose per milliliter) and at three temperatures (4 C, 10 C, and 20 C), ...

supports the hypothesis of a common source outbreak, linked to Nile river cruises. The outbreak also suggests the need to consider an intensification of the vaccination policy for travellers to hepatitis ...