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Abiy Ahmed Ali

(Encyclopedia)Abiy Ahmed Ali, 1976–, Ethiopian political leader. Joining the Ethiopian army in 1993, he served in the intelligence service, the UN peacekeeping mission in Rwanda, and the border ...

epidemiology

(Encyclopedia)epidemiology, field of medicine concerned with the study of epidemics, outbreaks of disease that affect large numbers of people. Epidemiologists, using sophisticated statistical analyses, field invest...

Medicaid

(Encyclopedia)Medicaid, national health insurance program in the United States for low-income persons and persons with disabilities. It was established in 1965 with passage of the Social Security Amendments and is ...

Métis, in Canadian history and society

(Encyclopedia)Métis [Fr.,=mixed], person of mixed racial heritage, particularly a descendant of French and English fur traders and indigenous women, principally in the Canadian prairie provinces of Alberta, Manito...

orphan drug

(Encyclopedia)orphan drug, drug developed under the U.S. Orphan Drug Act (1983) to treat a disease that affects fewer than 200,000 people in the United States. The orphan drug law offers tax breaks and a seven-year...

McMaster, John Bach

(Encyclopedia)McMaster, John Bach, 1852–1932, American historian, b. Brooklyn, N.Y. Having practiced engineering in New York City and written two books, McMaster was appointed (1877) an instructor in civil engine...

Manning, Patrick Augustus Mervyn

(Encyclopedia)Manning, Patrick Augustus Mervyn, 1946–2016, Trinidadian political leader, prime minister of Trinidad and Tobago (1991–95, 2001–10). He entered politics in the 1960s while studying geology at th...

Martens, Wilfried

(Encyclopedia)Martens, Wilfried, 1936–2013, Belgian statesman. A lawyer, Flemish Christian Democrat, and well-respected negotiator, he was president (1965–71) of the youth wing of the Christian People's party a...

Abyei

(Encyclopedia)Abyei, disputed region, c.4,000 sq mi (10,400 sq km), on the border of Sudan and South Sudan. Claimed by both Sudan and South Sudan, the area was given special administative status under the 2004 peac...

Legionnaire's disease

(Encyclopedia)Legionnaire's disease lēˌjənârzˈ [key], infectious, sometimes fatal, disease characterized by high fever, dry cough, lung congestion, and subsequent pneumonia. Major organs, such as the heart, ma...