The CDC’s updated infection prevention and control guidance (as of March 10) notes that face masks are an acceptable alternative when the supply chain of respirators cannot meet the demand. In this case, respirators should be prioritized for procedures likely to generate respiratory aerosols, which pose the highest risk to health care professionals. If there are shortages of gowns, they should be prioritized for aerosol-generating procedures, care activities where splashes and sprays are anticipated, and high-contact patient care activities that provide opportunities for transfer of pathogens to the hands and clothing of HCP.