Health benefit for the child and promotion of the common good were the two most important reasons for participation in the FinIP vaccine trial

Highlights • Health benefit and promotion of the common good were important reasons to consent. • Vaccine safety concerns were the main reason for declining consent. • Double-blind design affected negatively on the participation. • 65% of non-consenters declared that no trials should be conducted in children. • Clinical trials’ rationale and design need to be explained to the public.