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.

Evidence Shows Masks Really Do Reduce the Spread of COVID-19 and

Diagnostics, Free Full-Text

Resources County of Glenn

Epidemiologic and economic modelling of optimal COVID-19 policy

Mask Adherence and the Relationship Between Masking and Weather

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

High rates of observed face mask use at Colorado universities

Community exposures among Colorado adults who tested positive for

Real-world uptake of COVID-19 vaccination among individuals

Effectiveness of behavioural interventions to influence COVID-19

In Case You Missed It: MMWR and COVID - Homeland Security Digital

SciELO - Brasil - Effectiveness of wearing masks during the COVID

Diagnostics, Free Full-Text

Waning of two-dose BNT162b2 and mRNA-1273 vaccine effectiveness