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Indications for worldwide increased norovirus activity associated with emergence of a new variant of genotype II.4, late 2012

Abstract

Globally, surveillance systems showed an increase in norovirus activity in late 2012. Molecular data shared through the NoroNet network suggest that this increase is related to the emergence of a new norovirus genotype II.4 variant, termed Sydney 2012. Healthcare institutions are advised to be prepared for a severe norovirus season.

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