High Proportion of Asymptomatic SARS-CoV-2 Infections in 9 Long-Term Care Facilities, Pasadena, California, USA, April 2020

Emerg Infect Dis. 2020 Oct;26(10):2416-2419. doi: 10.3201/eid2610.202694. Epub 2020 Jul 2.

Abstract

Our analysis of coronavirus disease prevalence in 9 long-term care facilities demonstrated a high proportion (40.7%) of asymptomatic infections among residents and staff members. Infection control measures in congregate settings should include mass testing-based strategies in concert with symptom screening for greater effectiveness in preventing the spread of severe acute respiratory syndrome coronavirus 2.

Keywords: 2019 novel coronavirus disease; COVID-19; California; SARS-CoV-2; United States; assisted living facility; coronavirus disease; long-term care facilities; severe acute respiratory syndrome coronavirus 2; skilled nursing facility; zoonoses.

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Assisted Living Facilities / statistics & numerical data*
  • Asymptomatic Infections / epidemiology*
  • COVID-19
  • California / epidemiology
  • Cities / epidemiology
  • Coronavirus Infections / complications
  • Coronavirus Infections / diagnosis
  • Coronavirus Infections / epidemiology*
  • Female
  • Health Personnel / statistics & numerical data*
  • Housekeeping / statistics & numerical data
  • Humans
  • Maintenance / statistics & numerical data
  • Male
  • Middle Aged
  • Pandemics
  • Pneumonia, Viral / complications
  • Pneumonia, Viral / diagnosis
  • Pneumonia, Viral / epidemiology*
  • Prevalence
  • Skilled Nursing Facilities / statistics & numerical data*