Spread of the Delta variant, vaccine effectiveness against PCR-detected infections and within-host viral load dynamics in the community in France - Archive ouverte HAL Access content directly
Preprints, Working Papers, ... Year : 2021

Spread of the Delta variant, vaccine effectiveness against PCR-detected infections and within-host viral load dynamics in the community in France

Abstract

We use a large number of SARS-CoV-2 PCR tests in the community in France from 15th May 2021 to 7th July 2021 and infer 76% vaccine effectiveness against PCR detected infection, similar effectiveness against Delta and previous variants, a +67% to +217% transmission advantage for Delta depending on the region, and a larger viral load at symptom onset (-2.4 Ct) for Delta variant infections.
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Dates and versions

hal-03289443 , version 1 (16-07-2021)

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  • HAL Id : hal-03289443 , version 1

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François Blanquart, Clémence Abad, Joevin Ambroise, Mathieu Bernard, Gina Cosentino, et al.. Spread of the Delta variant, vaccine effectiveness against PCR-detected infections and within-host viral load dynamics in the community in France. 2021. ⟨hal-03289443⟩
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