NIOSH is warning consumers of the existence of counterfeit respirators and advising employers and employees to stop using them, as they may not provide adequate protection. These counterfeit respirators are unverified imitations of legitimate products, which do not carry NIOSH assurances they provide protection or prevent harm.

Shanghai Lansheng Light Industrial Products was found to be selling counterfeit N95 respirators under another company's name (Shanghai Dasheng Health Products Manufacture Co. Ltd) and using its device number (DTC3X N95). Counterfeit N95 respirators made by Shanghai Lansheng Light Industrial Products were falsely labeled, marked and sold as approved by the US National Institute for Occupational Safety and Health (NIOSH). The company was directed to stop sales and recall the product.

Check whether your N95 respirator has been tested and certified by the U.S. National Institute for Occupational Safety and Health (NIOSH), which provides tips on how to identify legitimate and counterfeit products on its website.