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AIDS was first identified in the USA in 1981. The epidemic has now spread to every part of the USA and to all sectors of society. It is thought that more than one million people are living with HIV in the USA and that more than half a million have died after developing AIDS. American HIV surveillance data are not comprehensive so many statistics must be based on reports of AIDS diagnoses. In interpreting such AIDS statistics, it is important to remember that they do not correspond to new HIV infections. Most people live with HIV for several years before developing AIDS.
