STEP Vaccine Clinical Trial — Phase IIB

Between 2004 and 2007, the National Institutes of Health conducted a STEP vaccine clinical trial — Phase IIB “test-of-concept” study. The STEP study is the name of a clinical trial to test an experimental human immunodeficiency virus (HIV) vaccine. The STEP study enrolled 3,000 participants at sites in Australia, Brazil, Canada, the Dominican Republic, Haiti, […]

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