two core functions of the world health organization (who) are
World Health Organization The constitution of the World Health Organization had been signed by 61 countries on 22 July 1946, with the first meeting of the World Health Assembly finishing on 22 July 1946. It incorporated the Office International d'Hygiène Publique and the League of Nations Health Organization. Since its establishment, it has played a leading role in the eradication of smallpox. Its current priorities include communicable diseases, in particular HIV/AIDS, Ebola, malaria and tuberculosis; the mitigation of the effects of non-communicable diseases such as sexual and reproductive health, development, and aging; nutrition, food security and healthy eating; occupational health; substance abuse; and driving the development of reporting, publications, and networking.
United States Public Health Service The United States Public Health Service (PHS) is a division of the Department of Health and Human Services concerned with public health. It contains eight out of the department's eleven operating divisions. The Assistant Secretary for Health (ASH) oversees the PHS.  The Public Health Service Commissioned Corps (PHSCC) is the federal uniformed service of the PHS, and is one of the seven uniformed services of the United States.