Cochrane review finds we are still uncertain about the effects of face masks to reduce the spread of respiratory viruses. Editorial: “Policy makers must act on incomplete evidence in responding to COVID‐19”

Physical interventions to interrupt or reduce the spread of respiratory viruses – Cochrane Library

Editorial: Policy makers must act on incomplete evidence in responding to COVID‐19

Commentary: Face masks cut disease spread in the lab, but have less impact in the community. We need to know why – The Conversation