Accession Number:

AD1115100

Title:

Estimated Effectiveness of Symptom and Risk Screening to Prevent the Spread of COVID-19

Descriptive Note:

Journal Article - Open Access

Corporate Author:

NATIONAL INSTITUTES OF HEALTH BETHESDA MD BETHESDA United States

Report Date:

2020-02-24

Pagination or Media Count:

60.0

Abstract:

Traveller screening is being used to limit further spread of COVID-19 following its recent emergence, and symptom screening has become a ubiquitous tool in the global response. Previously, we developed a mathematical model to understand factors governing the effectiveness of traveller screening to prevent spread of emerging pathogens Gostic etal., 2015. Here, we estimate the impact of different screening programs given current knowledge of key COVID-19 life history and epidemiological parameters. Even under best-case assumptions, we estimate that screening will miss more than half of infected people. Breaking down the factors leading to screening successes and failures, we find that most cases missed by screening are fundamentally undetectable, because they have not yet developed symptoms and are unaware they were exposed. Our work underscores the need for measures to limit transmission by individuals who become ill after being missed by a screening program. These findings can support evidence-based policy to combat the spread of COVID-19, and prospective planning to mitigate future emerging pathogens.

Subject Categories:

  • Medicine and Medical Research

Distribution Statement:

APPROVED FOR PUBLIC RELEASE