MMGH conducted an assessment on behalf of the Wellcome Trust to understand the impact of different factors which enabled the rapid clinical development and regulatory authorisation for COVID-19 vaccines. The project approach is comprised of extensive stakeholder surveys and interviews complemented by a literature review, quantitative analyses, including a regression analysis, and expert focus groups. Together, these activities identified the key factors that influenced the clinical development timelines for COVID-19 vaccines and highlighted which factors could be replicated in future vaccine development efforts.