we are laboratory and pharmatical company dealing with prevention and medicalequipments ,N95 respirators and surgical masks (face masks) are examples of personal protective equipment that are used to protect the wearer from airborne particles and from liquid contaminating the face. Centers for Disease Control and Prevention (CDC) National Institute for Occupational Safety and Health (NIOSH) and Occupational Safety and Health Administration (OSHA) also regulate N95 respirators.It is important to recognize that the optimal way to prevent airborne transmission is to use a combination of interventions from across the hierarchy of controls, not just PPE alone.All personal protective equipment (PPE) that is intended for use as a medical device must follow the FDA’s regulations and meet specific performance standards for protection and Other government agencies.