Sweden Sees Sharp Rise in Tick-Borne Encephalitis Cases, Health Authorities Stress Vaccination

Sweden is experiencing a notable increase in cases of tick-borne encephalitis (TBE) this summer, with 213 reported infections as of July 20, 2026. This figure marks a significant rise compared to 111 cases in 2024 and 138 in 2025 during the same period. The Public Health Agency of Sweden (Folkhälsomyndigheten) highlights the importance of vaccination, especially for people in areas with moderate to high TBE prevalence such as Sörmland, Uppsala, Värmland, and Västmanland.

TBE is transmitted through tick bites and can cause severe neurological symptoms, including confusion, personality changes, motor deficits, and loss of consciousness. Vaccination is recommended for those at risk, with different schedules depending on age and immune status. People under 50 should receive two doses, followed by a booster after one year and then booster shots every ten years. Older adults or those with weakened immune systems require an initial series of three doses and more frequent boosters.

Vaccination costs vary from 350 to 550 SEK per dose for adults, while some regions offer free vaccinations for children and young people. However, the TBE vaccine is not yet included in the national vaccination program for children, pending government approval. Ulrika Marking from the Public Health Agency underscores that full protection is achieved two weeks after the third vaccine dose.