Josephine van Dongen

7 Evaluation of implementing a targeted rotavirus vaccine program 163 statements that could be scored on a five-point Liker t-scale (from completely disagree to fully agree). Statements like “The information provided to me about rotavirus vaccination was easy to understand” were proposed for information provision and “I received timely information; I had sufficient time to decide whether I wanted to vaccinate my child” for the execution. The survey contained multiple choice questions on preference of rotavirus vaccination strategy, for instance preferred setting for patient selection, indication and vaccine delivery. The survey questionnaires are attached as supplementary material. A sample of five to ten HCP and parents per par ticipating hospital were invited to complete the questionnaires. Both parents of vaccinated and non-vaccinated infants were invited to participate. Figure 1. Timeline of HRV implementation and survey process Invitations were sent via newsletters, RIVAR Facebook page and personal email. Questionnaires were developed and distributed via SurveyMonkey©. There were three surveys at different time points ( Figure 1 ). Hospitals par ticipated in the different surveys at least three months after implementation of HRV. In addition, the first two themes (1. information provision and 2. program execution) were fur ther explored by the in-depth interviews. We conducted semi-structured interviews with HCP and research personnel on barriers and facilitators encountered during the implementation process. We approached different type of HCP and research personnel from a selection of par ticipating hospitals. The interviews were performed by JvD, documented and verified with each interviewee.