MEMORANDUM Date: January 5, 2022 To: USC Faculty and University Staff CC: USC Students From: Deona Willes, MPH, CLS, Executive DirectorUSC Environmental Health & Safety (EH&S)Sarah Van Orman, MD, MMM, FACHAChief Health Officer, USC Student HealthDivision Chief for College Health, Keck School of Medicine of USC Subject: Updated Masking Guidance for Campus Environments As many…