Measuring Basic Reproduction Number to Assess Effects of Nonpharmaceutical Interventions on Nosocomial SARS-CoV-2 Transmission - Archive ouverte HAL Access content directly
Journal Articles Emerging Infectious Diseases Year : 2022

Measuring Basic Reproduction Number to Assess Effects of Nonpharmaceutical Interventions on Nosocomial SARS-CoV-2 Transmission

(1, 2, 3, 4, 5) , (6) , (2) , (3, 7, 4) , (1, 2, 8)
1
2
3
4
5
6
7
8

Abstract

Outbreaks of SARS-CoV-2 infection frequently occur in hospitals. Preventing nosocomial infection requires insight into hospital transmission. However, estimates of the basic reproduction number (R0) in care facilities are lacking. Analyzing a closely monitored SARS-CoV-2 outbreak in a hospital in early 2020, we estimated the patient-to-patient transmission rate and R0. We developed a model for SARS-CoV-2 nosocomial transmission that accounts for stochastic effects and undetected infections and fit it to patient test results. The model formalizes changes in testing capacity over time, and accounts for evolving PCR sensitivity at different stages of infection. R0 estimates varied considerably across wards, ranging from 3 to 15 in different wards. During the outbreak, the hospital introduced a contact precautions policy. Our results strongly support a reduction in the hospital-level R0 after this policy was implemented, from 8.7 to 1.3, corresponding to a policy efficacy of 85% and demonstrating the effectiveness of nonpharmaceutical interventions.
Fichier principal
Vignette du fichier
21-2339-combined.pdf (4.02 Mo) Télécharger le fichier
Origin : Publication funded by an institution

Dates and versions

hal-03761483 , version 1 (29-08-2022)

Licence

Attribution - CC BY 4.0

Identifiers

Cite

George Shirreff, Jean-Ralph Zahar, Simon Cauchemez, Laura Temime, Lulla Opatowski. Measuring Basic Reproduction Number to Assess Effects of Nonpharmaceutical Interventions on Nosocomial SARS-CoV-2 Transmission. Emerging Infectious Diseases, 2022, 28 (7), pp.1345-1354. ⟨10.3201/eid2807.212339⟩. ⟨hal-03761483⟩
76 View
12 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More