The below information is direct or paraphrased from several sources, but primarily the FDA.
Do filtering face-piece respirators (FFRs) not approved by the National Institutes of Occupational Safety and Health (NIOSH), provide the same protection as NIOSH-approved respirators?
As mentioned in CDC's strategies for optimizing respirator supply, other countries approve respirators according to standards. These devices are evaluated using methods similar to those used by NIOSH, and are still expected to provide adequate protection for healthcare personnel, given shortages of FFRs resulting from the COVID-19 pandemic. Under these circumstances, the FDA believes these devices may serve as suitable alternatives for personal respiratory protection during this period of shortage caused by the COVID-19 pandemic.
What does wearing a face mask for source control mean?
Source control means preventing the transmission of infection through a person’s respiratory secretions which are produced when speaking, coughing, or sneezing. Face masks, including cloth face coverings, help with source control by covering the wearer’s mouth and nose. COVID-19 may be spread through respiratory secretions by individuals who may or may not have symptoms of COVID-19.