A recent report looked at COVID-19 safety in workplaces outside of hospitals and clinics. It focused on what kinds of hazard controls, like masks or ventilation changes, were used by employers in the United States to try to protect their workers. The report describes these practices but was not a formal study that measured results.
The report is observational, meaning it simply noted what was happening without comparing it to workplaces that did not use these controls. It did not track whether workers got sick, so we don't know if the safety measures actually prevented COVID-19 cases. No specific numbers, effectiveness data, or safety concerns from the controls were reported.
Because this is a descriptive report and not a measured study, it cannot tell us which safety practices are most helpful. Readers should see this as a snapshot of what some workplaces were doing, not as proof of what works best. More research would be needed to understand the real-world impact of these workplace safety measures on preventing illness.