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What is known about the use of medical masks by essential non-medical workers to prevent community transmission of COVID-19?

 

Findings related to the question could be split into two areas: 1) evidence on the wearing of medical masks by non-medical essential workers; and 2) evidence related to the implementation of medical masks for non-medical essential workers. We identified seven documents that provide highly relevant evidence to answer the question, including six guidelines from four groups – Centers for Disease Control and Prevention (U.S.), South African College of Medicines, and World Health Organization (WHO), and a group that published an overview of jurisdictional guidance in The Lancet – that were developed using some type of evidence synthesis or expert opinion, as well as one primary study.

Rapid evidence profile: