Horowitz Reports: CDC Study COVID Cases and Masks

Community and Close Contact Exposures Associated with COVID-19 Among Symptomatic Adults ≥18 Years in 11 Outpatient Health Care Facilities

The US Center for Disease Control performed a study which showed that 85 percent of those who contracted COVID-19 during July 2020 were mask wearers. Just 3.9 percent of the study participants never wore a mask.  This is a downloadable PDF of that report.