A case is presented of HIV-infection in a child born to an HIV(+) mother belonging to a high-risk group. The diagnosis was determined through multiple identification of anti-HIV-antibodies by means of the ELISA and Western blot tests in a child with lymphopenia, depressed CD4 lymphocyte count and diminished CD4 and CD8 index. Retrovir, among others, has been used in treatment. At present the child is 3.5 years-old and is developing normally. Persistent insignificant enlargement of all groups of lymphnodes, the liver and the spleen is present Full-blown AIDS has not developed yet.