Study participants and vaccination schedule
140 study participants were planned for the present clinical trial. Over the course of 17 months, 161 volunteers were screened, 145 of whom were found to be eligible for the clinical trial and enrolled into one of the seven cohorts (A1, A2, B1, B2, C, D, and E). All but six study participants completed the trial, leaving the clinical trial with a final 139 study participants (