These masks are not NIOSH (National Institute of Occupational Health & Safety) or FDA approved. This type of mask has not been tested for effectiveness or safety. Respirators or masks can make it difficult to breath due to carbon dioxide build-up and can be dangerous and could even lead to death . People that are pregnant or who have chronic respiratory or other medical conditions should not use.
In settings where facemasks are not available, HCP might use homemade masks (e.g., bandana, scarf) for care of patients with COVID-19 as a last resort. However, homemade masks are not considered PPE, since their capability to protect HCP is unknown. Caution should be exercised when considering this option. Homemade masks should ideally be used in combination with a face shield that covers the entire front (that extends to the chin or below) and sides of the face.