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immunity

(Encyclopedia)immunity, ability of an organism to resist disease by identifying and destroying foreign substances or organisms. Although all animals have some immune capabilities, little is known about nonmammalian...

medicine

(Encyclopedia)medicine, the science and art of treating and preventing disease. Modern medicine, characterized by growing specialization and a complex diagnostic and therapeutic technology, faces problems in the...

South Dakota

(Encyclopedia)CE5 South Dakota dəkōˈtə [key], state in the N central United States. It is bordered by North Dakota (N), Minnesota and Iowa (E), Nebraska (S), and Wyoming and Montana (W). ...

Louisiana

(Encyclopedia)CE5 Louisiana ləwēˌzēănˈə, lo͞oēˌ– [key], state in the S central United States. It is bounded by Mississippi, with the Mississippi River forming about half of the border (E), the Gulf o...

Cuba

(Encyclopedia)CE5 Cuba kyo͞oˈbə, Span. ko͞oˈbä [key], officially Republic of Cuba, republic (2020 est. pop. 11,326,616), ...

Haiti

(Encyclopedia)CE5 Haiti äētēˈ [key], officially Republic of Haiti, republic (2015 est. pop. 10,711,000), 10,700 sq mi (27,713 sq km), West Indies, on the western third of the island of Hispaniola. It is boun...

United States

(Encyclopedia)CE5 CE5 CE5 United States, officially United States of America, republic (2015 est. pop. 319,929,000), 3,539,227 sq mi (9,166,598 sq km), North America. The United States is the world's third l...