Frontline health care workers (HCWs) are at high risk of acquiring respiratory viral infections, including influenza and SARS-CoV-2 infections.
1,2 During the COVID-19 pandemic, HCWs used personal protective equipment (PPE), such as an N95 filtering facepiece respirator (hereafter, N95), to reduce their risk of becoming infected.
3,4 N95s are tight-fitting, disposable respirators designed to prevent aerosolized transmission of viral particles and reduce the likelihood of HCWs acquiring a respiratory viral infection, thus mitigating risk for an essential workforce.
4-7 Under nonpandemic circumstances, standard practice is to discard an N95 after close contact with a patient (ie, single use). Prior infectious disease outbreaks and pandemics necessitating N95 conservation prompted the Centers for Disease Control and Prevention to revise its recommendation to include guidelines for both extended use (wearing the same N95 for multiple patient encounters without donning and doffing) and limited reuse (storing an N95 between donnings for no more than 5 donnings), albeit with limited evidence.
8,9 Frontline HCWs (including those in emergency departments [EDs]) generally followed these guidelines to conserve PPE during the COVID-19 pandemic, practicing a combination of reuse and extended use of N95s, which we collectively term
reuse.
10 In practice, patterns of use varied across EDs based on a number of factors, including supply chain and local hospital guidance.