Personal protective equipment comprises gloves, gowns, masks, regular respirators, and powered air purifying respirators (PAPRs). In this Clinical Review podcast Trish Perl, MD, of UT Southwestern Medical Center reviews the indications for each and the results of the RESPECT trial, which reported no difference in incidence of laboratory-confirmed influenza among health care personnel randomized to wear N95 respiratory or medical masks. She's interviewed by JAMA Fishbein fellow Angel Desai, MD.