This meta analysis summarizes the available data concerning the impact that the 1991 announcement of Earvin "Magic" Johnson, a National Basketball Association all-star, had on the issues concerning HIV infection and testing. The analysis notes that the effect of Johnson's disclosure may not be uniform for all possible outcomes. Some outcomes of education and prevention efforts focus on increasing the level of accurate knowledge of the general population. Other outcomes deal with diminishing the spread of the disease by suggesting means of reducing exposure. Results demonstrate that the announcement increased the level of accurate knowledge in persons; the number of persons undergoing testing for HIV; and the desire to obtain more information. For adults the impact of the announcement was to increase the perception of vulnerability, while for children/adolescents the announcement diminished the perception of risk. Contains 30 references. (Author/BT)