Effectiveness of Face Mask or Respirator Use in Indoor Public

This report describes face mask or respirator effectiveness in helping protect against COVID-19 infection.

Face masks and respirators in the fight against the COVID-19 pandemic: An overview of the standards and testing methods - ScienceDirect

N95 respirator - Wikipedia

Petition to Drug Stores: Stop In-Store COVID Exposure & Transmission!

Which type of face mask is most effective against COVID-19?

LAC, DPH

Face mask effectiveness: What science knows now - CBS News

EPA Researchers Test Effectiveness of Face Masks, Disinfection Methods Against COVID-19

N95 respirator - Wikipedia

Face Coverings (Masks). Wear them to protect your friends and