■ Consider using PAPRs or SARs, which are more protective than filtering facepiece respirators, for any work operations or procedures likely to generate aerosols (e.g., cough induction procedures, some dental procedures, invasive specimen collection, blowing out pipettes, shaking or vortexing tubes, filling a syringe, centrifugation). ■ Use a surgical N95 respirator when both respiratory protection and resistance to blood and body fluids is needed. ■ Face shields may also be worn on top of a respirator to prevent bulk contamination of the respirator. Certain respirator designs with forward protrusions (duckbill style) may be difficult to properly wear under a face shield. Ensure that the face shield does not prevent airflow through the respirator. ■ Consider factors such as function, fit, ability to decontaminate, disposal, and cost. OSHA’s Respiratory Protection eTool provides basic information on respirators such as medical requirements, maintenance and care, fit testing, written respiratory protection programs, and voluntary use of respirators, which employers may also find beneficial in training workers at: www.osha.gov/SLTC/ etools/respiratory. Also see NIOSH respirator guidance at: www.cdc.gov/niosh/topics/respirators. ■ Respirator training should address selection, use (including donning and doffing), proper disposal or disinfection, inspection for damage, maintenance, and the limitations of respiratory protection equipment. Learn more at: www. osha.gov/SLTC/respiratoryprotection. ■ The appropriate form of respirator will depend on the type of exposure and on the transmission pattern of COVID-19. See the NIOSH “Respirator Selection Logic” at: www. cdc. gov/niosh/docs/2005-100/default.html or the OSHA “Respiratory Protection eTool” at www.osha.gov/ SLTC/etools/respiratory. OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION 16