[The main directions of studies in evolutionary immunology].

The main directions in evolutionary immunology include: (1) study of phylogenetic relationships between nonspecific (hereditary) and specific (acquired, or adaptive) immunity; (2) study of the phenomena of graft rejection in a phylogenetic series; (3) study of occurrence and historical development of T- and B-systems of immunity; (4) study of phylogenesis of different cell types of the immunity system; and (5) study of historical development of the ability to specifically recognize foreign antigenic material. Because many problems of evolutionary immunology remain unsolved, studies in this field will be continued.