Research and analysis
Duke University: Low-cost measurement of face mask efficacy for filtering expelled droplets during speech, 7 August 2020
Paper prepared by Duke University academics on face masks.
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Paper prepared by academics from Duke University on face mask efficacy for filtering expelled droplets during speech. This paper was available for participants to read at SAGE 51 on 13 August 2020, but not considered or discussed in the meeting. As new evidence or data emerges, SAGE updates its advice accordingly.
These documents are released as pre-print publications that have provided the government with rapid evidence during an emergency. These documents have not been peer-reviewed and there is no restriction on authors submitting and publishing this evidence in peer-reviewed journals.