Design of the study
Two-group design was used in which a two-arm randomized trial was selected and performed in June 2020 (The academic year in Iran begins in the mid-half of September every year and continues until the mid-half of August of the following year) at the Undergraduate Public Health Course at Hamadan University of Medical Science. Due to the Covid-19 outbreak and lack of in-person apprenticeship, it was not possible to select a control group from the current semester students that passed vaccination skill training in the Health Centers. For this reason, the control group was selected from students of the same course who had passed the in-person vaccination apprenticeship in the previous year.This randomized controlled clinical trial was performed on 120 Undergraduate Public Health students at Hamadan University of Medical Science in Hamadan in the west of Iran during January 2020.