The United States of America (USA) is a developed country, commonly referred to as the United States (U.S.) or America. It is a federal republic composed of 50 states, the federal district of Washington DC, five major territories. In central North America between Canada and Mexico, there are 48 contiguous states and Washington DC. The state of Alaska is in the northwestern part of North America and the state of Hawaii is an archipelago in the mid-Pacific. The territories are scattered about the Pacific Ocean and the Caribbean Sea.
The United States of America is the world's third largest country in size and nearly the third largest in terms of population. Located in North America, the country is bordered on the west by the Pacific Ocean and to the east by the Atlantic Ocean. Along the northern border is Canada and the southern border is Mexico. The United States, with its large size and geographic variety, includes most climate types. To the east of the 100th meridian, the climate ranges from humid continental in the north to humid subtropical in the south.
The United States has a capitalist mixed economy which is fueled by abundant natural resources and high productivity. The United States is the largest importer of goods and second largest exporter, though exports per capita are relatively low. The country ranks ninth in the world in nominal GDP per capita and sixth in GDP per capita. The U.S. dollar is the world's primary reserve currency. The Division of Diabetes and Endocrinology has enjoyed unprecedented growth in the country.
This country has given 357 Noble laureates to the World out of which 100 awards are from Physiology/Medicine. The Infectious Diseases Society of America (IDSA) represents physicians, scientists and other health care professionals who specialize in infectious diseases. IDSA’s purpose is to improve the health of individuals, communities, and society by promoting excellence in patient care, education, research, public health, and prevention relating to infectious diseases. The Infectious Diseases Research Institute, Centre for Infectious Diseases Research, National Institute of Allergy and Infectious Diseases, Centre for Global Infectious Disease Research are some of the research institutes that carries out research on Infectious Diseases. American Journal of Infectious Diseases, American Journal Of Infectious Diseases and Microbiology, The journal of Infectious Diseases are some of the Journals of Infectious Diseases.