National Academies of Sciences, Engineering, and Medicine. 2020. Rapid Expert Consultation on the Effectiveness of Fabric Masks for the COVID-19 Pandemic (April 8, 2020). Washington, DC: The National Academies Press. https://doi.org/10.17226/25776. “In response to a request from the Office of Science and Technology Policy (OSTP), the National Academies of Sciences, Engineering, and Medicine convened a standing committee of experts to help inform OSTP on critical science and policy issues related to emerging infectious diseases and other public health threats. The standing committee includes members with expertise in emerging infectious diseases, public health, public health preparedness and response, biological sciences, clinical care and crisis standards of care, risk communication, and regulatory issues. This publication responds to questions concerning the effectiveness of homemade fabric masks worn by the general public to protect others, as distinct from protecting the wearer.”