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Important Information about Step Study: Merck & Co., Inc. and the HIV Vaccine Trials Network announce that vaccination is being discontinued in the Step Study. The investigational vaccine has been found to be not effective. If you are a volunteer in the Step Study, we encourage you to come into the clinic for follow-up visits.
› Efficacy Results from the Step Study
› Immunological Characterization of Subjects from the Step Study › Latest Q & A about STEP Study › Volunteers to be Informed Whether They Received Vaccine or Placebo › Data from STEP Study Presented at Open Scientific Session › Update on the STEP and Phambili HIV vaccine trials › Vaccination and Enrollment Are Discontinued › NIAID's statement › AIDS Vaccine Advocacy Coalition's statement |