Helene-Mari van der Westhuizen doctoral researcher, Koot Kotze doctoral researcher, Sarah Tonkin-Crine senior researcher, Nina Gobat senior researcher, Trisha Greenhalgh professor of primary care health sciences
van der Westhuizen H, Kotze K, Tonkin-Crine S, Gobat N, Greenhalgh T.
Face coverings for covid-19: from medical intervention to social practice
BMJ 2020; 370 :m3021
doi:10.1136/bmj.m3021