8 January 2013
Latest figures from the Health Protection Agency (HPA) show there have been 4,140 laboratory confirmed cases of norovirus this season (from week 27 to week 52 2012). The latest figures are 63 per cent higher than the number of cases reported at this point last year, when there were 2,535 cases.
The downward trend in the number of confirmed cases has continued in line with the previous report although this is to be expected following the Christmas and New Year period. We will expect to see the number of cases increase again over the following few weeks.
During the two weeks up to 6 January there were 33 hospital outbreaks reported, compared to 30 in the previous fortnight, bringing the total of outbreaks for the season to 673.
Cases of norovirus have risen earlier than expected this winter season and this is a trend that has been seen across Europe and other parts of the world. It has not yet been determined why this has been the case and activity varies significantly from year to year.
John Harris, an expert in norovirus from the HPA said: “Our latest figures covering the New Year period show a further decline in the number of cases and this is what we would expect to see. We can never predict how busy a season will be or what will happen in the weeks ahead although, as with other norovirus seasons we will expect to see an increase in the number of laboratory reports in the next few weeks until the end of March when activity begins to fall away.
“If you think you may have the illness then it is important to stay away from hospitals, GP surgeries and care homes to avoid spreading it to people who may have underlying health conditions and already be vulnerable. Maintaining good hand hygiene is also important to help prevent it spreading.”
Norovirus can be transmitted by contact with contaminated surfaces or objects, by contact with an infected person, or by the consumption of contaminated food or water. Symptoms of norovirus include a sudden onset of vomiting and/or diarrhoea. Some people may have a temperature, headache and stomach cramps. The illness usually resolves in one or two days and there are no long-term effects.
Last reviewed: 8 January 2013