The agency’s monitoring of the virus indicates that the epidemic is underway, with the spread of infection gaining momentum in society. While cases can occur year-round, the peak period for widespread infection typically falls between November and April.
– How extensive the spread will be this season remains uncertain. Last season, more cases were reported than the previous year. The most intense weeks occurred in February, compared to April the season before, says deputy state epidemiologist Erik Sturegård in a press release.
Winter vomiting sickness is caused by the calicivirus, which can affect people of all ages.