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Euro Surveill. 2013 Jan 3;18(1):8-9.

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

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National Institute for Public Health and the Environment, Bilthoven, The Netherlands.


Globally, surveillance systems showed an increasein norovirus activity in late 2012. Molecular datashared through the NoroNet network suggest thatthis increase is related to the emergence of a newnorovirus genotype II.4 variant, termed Sydney 2012.Healthcare institutions are advised to be prepared fora severe norovirus season.

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