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Published on: November 10, 2023
Which features of an outpatient treatment for COVID-19 would be most important for pandemic control? A modelling
Jean-Philippe Lanoix1,2, Youcef Mammeri3, Jean-Luc Schmit1,2
1AGIR UR4294, Jules Verne University of Picardie, Amiens, France.
Insights
Effective outpatient treatment for coronavirus disease 2019 (COVID-19) can help control pandemics. Early and effective outpatient treatments significantly reduce disease spread, even moderate treatments can be beneficial.
Area of Science:
- Epidemiology
- Mathematical Modeling
Background:
- The COVID-19 pandemic has strained global healthcare systems.
- Lockdown and social distancing are primary control measures, but outpatient treatment effectiveness is also crucial.
Purpose of the Study:
- To adapt a mathematical model to assess the impact of outpatient treatment characteristics on epidemic control.
- To identify key parameters of outpatient treatment that influence viral transmission.
Main Methods:
- Utilized a mathematical model simulating viral transmission dynamics.
- Employed Morris global sensitivity analysis with 1000 trajectories to identify influential treatment parameters.
- Data on COVID-19 cases, recoveries, and deaths were sourced from Santé Publique France.
Main Results:
- Early initiation of highly effective outpatient treatment improves disease control.
- Even moderately effective outpatient treatment (5% effectiveness) initiated after the epidemic peak is superior to poor social distancing (<60% compliance).
- Treatment effectiveness, defined as reduced patient contagiousness, is a critical factor.
Conclusions:
- Outpatient treatment plays a significant role in pandemic control, complementing existing measures.
- Focusing solely on inpatient treatment and vaccines overlooks the potential of outpatient interventions.
- Moderately effective outpatient treatments can offer substantial benefits in managing the COVID-19 pandemic.
Abstract:
The global pandemic of coronavirus disease 2019 (COVID-19) has challenged healthcare systems worldwide. Lockdown, social distancing, and screening are thought to be the best means of stopping the virus from spreading and thus of preventing hospital capacity from being overloaded. However, it has also been suggested that effective outpatient treatment can control pandemics. We adapted a mathematical model of the beneficial effect of lockdown on viral transmission and used it to determine which characteristics of outpatient treatment would stop an epidemic. The data on confirmed cases, recovered cases, and deaths were collected from Santé Publique France. After defining components of the epidemic flow, we used a Morris global sensitivity analysis with a 10-level grid and 1000 trajectories to determine which of the treatment parameters had the largest effect. Treatment effectiveness was defined as a reduction in the patients' contagiousness. Early treatment initiation was associated with better disease control-as long as the treatment was highly effective. However, initiation of a treatment with a moderate effectiveness rate (5%) after the peak of the epidemic was still better than poor distancing (i.e. when compliance with social distancing rules was below 60%). Even though most of today's COVID-19 research is focused on inpatient treatment and vaccines, our results emphasize the potentially beneficial impact of even a moderately effective outpatient treatment on the current pandemic.
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