Since 1919. was chief sanitary services of the Ministry of Public Health (Department for racial, social and public hygiene) in Belgrade, laid the foundations of public health service in Yugoslavia and established a series of socio-medical institutions. Building advanced medicine came into conflict with the commercialized medicine, and because of its social-democratic ideology has become the ruling circles grata. After being forced into retirement 1931st He was an expert League of Nations Health Organization in China. He is responsible for the reform of teaching at the Zagreb Faculty of Medicine, the foundation of the College of Nurses and the Medical Faculty in Rijeka. Prepared by the Constitution of the World Health Organization in 1948. chaired by the First World Health Assembly in Geneva. He was the first vice-president of the Economic and Social Council of UN.