The only communicable disease transmitted nowadays by mosquitoes in Estonia is tularemia. The natural foci of tularemia are located on the islands of Pakri and Prangli. Vivax-malaria was an indigenous communicable disease in Estonia in the past. Its epidemic process stopped in 1949. After World War II malaria was imported to Estonia mainly by persons contaminated in the other regions of the Soviet Union. Beginning from the 1960s the main risk group of malaria are seamen visiting the ports of Western Africa.