Effectiveness of Face Mask or Respirator Use in Indoor Public Settings for Prevention of SARS-CoV-2 Infection — California, February–December 2021

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

The effect of activity and face masks on exhaled particles in

Is It Really Time to Take Off Your Mask on Public Transit?

Nasal mucosa is much more susceptible than oral mucosa to

Resources County of Glenn

Estimated Mask Use and Temporal Relationship to COVID-19

Mask Mandates Have Kept One Cancer Center Free From COVID-19

Association between self-reported masking behavior and SARS-CoV-2

COVID-19 transmission in U.S. transit buses: A scenario-based

Effectiveness of behavioural interventions to influence COVID-19

High engagement in nonpharmaceutical interventions and their