Promoting mask-wearing during the COVID-19 pandemic: a policymaker’s guide

“Promoting mask-wearing during the COVID-19 pandemic: a policymaker’s guide,” synthesizes global evidence on how masks prevent virus transmission and slow community spread, and identifies best practices for mask design and use. The playbook also provides tools for public health officials and leaders to take a data-and research-driven approach to promoting mask-wearing, including conducting formative research, considering masking mandates, running focused media campaigns, and engaging with communities.