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An anonymous cross-sectional paper-and-pencil survey was used to assess incentives and disincentives to participate in a Phase I preventive human immunodeficiency virus (HIV) vaccine trial in a potential Thai target population. A total of 255 persons employed in health care service and research settings completed questionnaires after attending informational briefings regarding the proposed vaccine product and the planned trial procedures. Willingness to participate was related to self-perceived benefits from joining a preventive vaccine trial, as well as to concerns about product safety and social discrimination that might result from participation. The distinction between positive results of enzyme-linked immunosorbent assay from vaccine administration and positivity from HIV infection was unclear for many participants. Men were more willing to participate than women, and there was a trend toward greater willingness to participate in those who were less educated. Preparations for preventive vaccine trials may be more successful if they emphasize personal benefits of trial participation, clearly address safety issues, and consider ways to prevent social discrimination against participants.
Jenkins et al. (Mon,) studied this question.