[Introduction to LGBT: definitions, some historical facts, and evolution of thinking in the era of HIV/AIDS--hopes and challenges].

This article deals with the subject matter of LGBT (lesbians, gays, bisexuals, transgenders), i.e. individuals who are not heterosexual, presenting definitions, some historical facts, and evolution of thinking in 2010. Attention is drawn to discrimination and stigmatization of members of the LGBT community. Problems related to the prevention of HIV/AIDS among men having sexual contacts with other men are discussed. A concise presentation of the functioning of the LGBT community in the heterosexual society is included. Emphasis is placed on equality of non-heterosexual orientations with reference to important ideas such as homo- and binormativity.