STUDYING ABOUT SOIL TRANSMITTED WORMS IN KHANH HOA POPULATION IN 2015 Targets: Determing the prevalence of soil-transmitted worms (Ascaris, Trichuris, hookworm) in Khanh Hoa population in 2015; Explaining knowledges, attitudes and practices on prevention of soil-transmitted worm infections in Khanh Hoa province; Describing some risk factors for soil-transmitted worm infections in Khanh Hoa province.