The COVID-19 vaccine tracker and landscape compiles detailed information of each COVID-19 vaccine candidate in development by closely monitoring their progress through the pipeline. The COVID-19 vaccine tracker: Provides summary tables of COVID-19 vaccine candidates in both clinical and pre-clinical development; Provides analysis and visualization for several COVID-19 vaccine candidate categories; Tracks the progress of each vaccine from pre-clinical, Phase 1, Phase 2 through to Phase 3 efficacy studies and including Phase 4 registered as interventional studies; Provides links to published reports on safety, immunogenicity and efficacy data of the vaccine candidates; Includes information on key attributes of each vaccine candidate and Allows users to search for COVID-19 vaccines through various criteria such as vaccine platform, schedule of vaccination, route of administration, developer, trial phase and clinical endpoints. The database is updated regularly - twice a week (Tuesday and Friday, 17:00 CET).