The Our World in Data COVID-19 vaccination dataset is a global public database tracking the scale and rate of vaccine rollouts worldwide. It includes data on total vaccinations, first and second doses, daily vaccination rates, and population-adjusted coverage for 169 countries as of 7 April 2021. The dataset is regularly updated and maintained to support policymakers, researchers, and the public in understanding vaccine rollout trends, policy responses, and the impact of vaccinations on pandemic outcomes. It is used by the World Health Organization, media outlets, and researchers to analyze global vaccine access, prioritize vaccination strategies, and assess the effectiveness of vaccination campaigns. The dataset provides metrics such as total doses administered, daily vaccination rates, and population-adjusted coverage, enabling comparisons between countries. It highlights significant disparities in vaccine access, with high-income countries often having higher vaccination rates than low-income countries. The dataset also includes information on prioritization strategies, such as the 'first dose first' approach used in the UK, which prioritizes single-dose coverage over full vaccination. The dataset is used to track the global vaccination progress, assess the effectiveness of vaccination in reducing transmission and mortality, and inform public health policies. It is also used to analyze the factors influencing vaccine rollout, including public trust, healthcare infrastructure, and government policies. The dataset is available for public access and is used by journalists, researchers, and policymakers to understand the global vaccination landscape. The dataset is built from official sources, including health ministries and government reports, and is regularly updated. It is available in a public GitHub repository and can be accessed through an online web application. The dataset is subject to technical validation to ensure accuracy and reliability. It is used to support research on vaccine effectiveness, public trust, and the global response to the pandemic. The dataset is a valuable resource for understanding the global vaccination campaign and its impact on pandemic outcomes.The Our World in Data COVID-19 vaccination dataset is a global public database tracking the scale and rate of vaccine rollouts worldwide. It includes data on total vaccinations, first and second doses, daily vaccination rates, and population-adjusted coverage for 169 countries as of 7 April 2021. The dataset is regularly updated and maintained to support policymakers, researchers, and the public in understanding vaccine rollout trends, policy responses, and the impact of vaccinations on pandemic outcomes. It is used by the World Health Organization, media outlets, and researchers to analyze global vaccine access, prioritize vaccination strategies, and assess the effectiveness of vaccination campaigns. The dataset provides metrics such as total doses administered, daily vaccination rates, and population-adjusted coverage, enabling comparisons between countries. It highlights significant disparities in vaccine access, with high-income countries often having higher vaccination rates than low-income countries. The dataset also includes information on prioritization strategies, such as the 'first dose first' approach used in the UK, which prioritizes single-dose coverage over full vaccination. The dataset is used to track the global vaccination progress, assess the effectiveness of vaccination in reducing transmission and mortality, and inform public health policies. It is also used to analyze the factors influencing vaccine rollout, including public trust, healthcare infrastructure, and government policies. The dataset is available for public access and is used by journalists, researchers, and policymakers to understand the global vaccination landscape. The dataset is built from official sources, including health ministries and government reports, and is regularly updated. It is available in a public GitHub repository and can be accessed through an online web application. The dataset is subject to technical validation to ensure accuracy and reliability. It is used to support research on vaccine effectiveness, public trust, and the global response to the pandemic. The dataset is a valuable resource for understanding the global vaccination campaign and its impact on pandemic outcomes.