If you are bitten, seek medical advice without delay. For more information, consult the Health appendix. Hepatitis A and diphtheria occur. Freshwater fish from the Baltic Sea area could contain fish tapeworm, causing diphyllobothriasis . Tick-borne encephalitis occurs in forested areas.
Vaccination is advisable.
Campers and trekkers should wear long trousers when walking near long grass in order to avoid tick bites.