Coronavirus Disease 2019 Serial Testing Among Hospitalized Patients in a Midwest Tertiary Medical Center, July-September 2020

Clin Infect Dis. 2021 Nov 2;73(9):e3116-e3119. doi: 10.1093/cid/ciaa1630.


We implemented serial coronavirus disease 2019 testing for inpatients with a negative test on admission. The conversion rate (negative to positive) on repeat testing was 1%. We identified patients during their incubation period and hospital-onset cases, rapidly isolated them, and potentially reduced exposures. Serial testing and infectiousness determination were resource intensive.

Keywords: COVID-19 diagnostic testing; Cycle threshold; diagnostic screening programs; infection control.

MeSH terms

  • COVID-19 Testing
  • COVID-19*
  • Hospitals
  • Humans
  • SARS-CoV-2