TBE cases in Sweden nearly triple compared to 2016

Sweden has recorded 99 TBE infections from tick bites so far in 2026, nearly triple the number reported in the same period in 2016, according to figures from the Public Health Agency of Sweden.

The rise is linked to climate change, which has extended the tick season, said Anna Omazic, a researcher at the Swedish National Veterinary Institute. Ticks are now being found year-round in southern and central Sweden, she added.

Most confirmed TBE cases have been reported in Stockholm, Uppsala, and along the west coast. The highest proportion of infections—about 25%—occur in the 60–69 age group, while children aged 0–9 account for just 2% of cases.

Only about one in a thousand ticks carries the TBE virus, though 10–25% may transmit Lyme disease bacteria. Omazic advised removing ticks as quickly as possible and checking for bites after time spent in green areas, including gardens and parks.

TBE, or tick-borne encephalitis, is a viral brain inflammation primarily spread by ticks. While rare in northern Sweden, it is more common in Götaland and Svealand. Vaccines and protective clothing are recommended for prevention.