Public Health Agency warns that norovirus is now spreading in Sweden, with more cases than at the same time last year. The outbreak is expected to increase in the coming weeks, and effects are already visible in schools like Götetorpsskolan on Hammarö.
Sweden has entered a new season of norovirus, caused by calicivirus, according to the Public Health Agency. On December 12, the agency reported that the outbreak is rising, with the number of cases expected to increase soon. Searches for symptoms on 1177.se rose last week, indicating greater spread in society. The season typically starts in week 49, and this year more cases are reported than during the same period in 2024.
In Östergötland, no major increase has been seen yet, but it is likely coming, says Karin Festin, deputy infection control doctor at Region Östergötland: “We haven't seen a major increase here in Östergötland yet, but it's only a matter of time.” No outbreaks are reported in healthcare, elderly care, or preschools, but the virus affects all ages, with worse symptoms for children and the elderly.
In Värmland, the increase is evident. At Götetorpsskolan in Hammarö, 104 out of 340 students are reported sick, with 82 in lower school and 22 in middle school. Principal Maria Fagerström describes the situation as exceptional: “I've never experienced such high absenteeism at one time.” The Lucia procession has been canceled, and the school has contacted infection control for advice beyond hygiene measures. Andreas Harling, deputy infection control doctor in Region Värmland, confirms cases in school environments but no increased pressure on healthcare.
Symptoms include nausea, vomiting, stomach ache, diarrhea, fever, headache, and body aches, according to the Public Health Agency.
