Henderson DK, Weber DJ, Babcock H, Hayden MK, Malani A, Wright SB, Murthy AR, Guzman-Cottrill J, Haessler S, Rock C, Van Schooneveld T, Logan L, Forde C. The perplexing problem of persistently PCR-positive personnel. Infect Control Hosp Epidemiol. 2021 02; 42(2):203-204.