Norovirus cases up 63% in second half of 2012

Cases of norovirus have risen earlier than expected this winter season, the HPA said. Credit: Flickr / AJ Cann

The number of confirmed cases of norovirus reported through the second half of last year rose by 63% compared with the same period in 2011, the Health Protection Agency has said.

Officials said there were 4,140 laboratory confirmed cases from early July until the final week of 2012, up from 2,535 cases the year before.

The officials said the recent Christmas and New Year period had seen a decline in the number of cases, as expected, although they anticipate an increase in the coming weeks.