72
Participants
Start Date
June 19, 2021
Primary Completion Date
January 10, 2022
Study Completion Date
January 10, 2022
cloth mask
Buff bandana double layer worn over nose and mouth
surgical mask
standard surgical mask
FFP2 respirator
filtering facepiece 2 respirator
Trisha Greenhalgh, Oxford
University of Nottingham
OTHER
King's College London
OTHER
University of Oxford
OTHER