Cummings DAT, Radonovich LJ, Gorse GJ, Gaydos CA, et al. Risk Factors for Healthcare Personnel Infection with Endemic Coronaviruses (HKU1,
OC43, NL63, 229E): Results from the Respiratory Protection Effectiveness Clinical
Trial (ResPECT). Clin Infect Dis 2020 Jul 9. pii: 5869459. doi: 10.1093.
PMID: 32645144