Hukumar Lafiya ta Duniya ( W.H.O ) hukuma ce ta musamman ta Majalisar Dinkin Duniya wacce ke da alhakin kula da lafiyar jama'a na duniya. Kundin Tsarin Mulki na WHO, wanda ke kafa tsarin hukumar da ka'idojin hukumar, ya bayyana babban burinta a matsayin "cimma nasarar dukkan al'ummomin da ke da matukar matakin kiwon lafiya". Yana da hedikwata a Geneva, Switzerland, tare da ofisoshin yanki shida masu cin gashin kansu da ofisoshin filaye 150 a duk duniya. An kafa WHO ta tsarin mulki a ranar 7 ga Afrilu 1948, wanda ake tunawa da shi a matsayin Ranar Kiwon Lafiya ta Duniya .Taron farko na Majalisar Lafiya ta Duniya (WHA), hukumar kula da hukumar, ta gudana ne a ranar 24 ga watan Yulin 1948. A WHO rajista da dukiya, ma'aikata, da kuma aikinsu na League of Nations "Health Organization da kuma Office International d'Hygiène Publique , ciki har da Classididdigar Cututtuka na Duniya (ICD). Aikinta ya fara da gaske a cikin 1951 biyo bayan mahimmin jiko na albarkatun kuɗi da fasaha.