COVID-19 Masks

Lancet 2020-06-01 and Science Media Centre expert review

Review for Indian Physicians Association, Sundeep Salvi

University of Edinburgh Usher Institute 4 rapid reviews for UK policy makers

Oxford CEBM review of respirators for healthcare workers

Debate on face coverings for the public (social masks) Greenhalgh et al

Latest WHO guidance for the public including videos:

Commissioned by WHO June 2020. Link:

Henning Bundgaard et a Effectiveness of Adding a Mask Recommendation to Other Public Health Measures to Prevent SARS-CoV-2 Infection in Danish Mask Wearers’ was published in Annals of Internal Medicine on Wednesday 18th November 2020.

Please read together with expert commentaries here explaining why the question wasn't asking about how masks protect others: source control