Dr. John Campbell
RCTs did not show a clear reduction in respiratory viral infection with the use of medical/surgical masks.
There were no clear differences between the use of medical/surgical masks compared with N95/P2 respirators in healthcare workers, when used in routine care to reduce respiratory viral infection.
Do physical measures such as hand-washing or wearing masks stop or slow down the spread of respiratory viruses? https://www.cochranelibrary.com/cdsr/…