Four corneas from two cadavers that later had positive test results on enzyme-linked immunosorbent assays and Western blot analysis for antibodies against the human immunodeficiency virus were inadvertently transplanted to recipients who were without known risk of human immunodeficiency virus infection. We performed serial studies of serologic markers of human immunodeficiency virus infection in the cornea recipients and assayed reverse transcriptase levels of their mixed lymphocyte cultures. The four cornea transplant recipients were followed up for 130, 152, 397, and 440 days, respectively, and the results on all serologic tests and reverse transcriptase assays remain negative.