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Volume 28, Number 7—July 2022
Research

Analyzing and Modeling the Spread of SARS-CoV-2 Omicron Lineages BA.1 and BA.2, France, September 2021–February 2022

Mircea T. Sofonea, Bénédicte Roquebert, Vincent Foulongne, David Morquin, Laura Verdurme, Sabine Trombert-Paolantoni, Mathilde Roussel, Jean-Christophe Bonetti, Judith Zerah, Stéphanie Haim-Boukobza, and Samuel AlizonComments to Author 
Author affiliations: Université de Montpellier, Montpellier, France (M.T. Sofonea); Laboratoire Cerba, Saint Ouen L’Aumône, France (B. Roquebert, L. Verdurme, S. Trombert-Paolantoni, M. Roussel, S. Haim-Boukobza); Centre Hospitalier Universitaire de Montpellier, Montpellier (V. Foulongne, D. Morquin); Laboratoire Cerballiance Paris et Île-de-France Est, Paris, France (J.-C. Bonetti, J. Zerah); Centre National de la Recherche Scientifique, Paris (S. Alizon)

Main Article

Figure 6

Ct values from the SARS-CoV-2 variant-specific screening quantitative PCR tests (N = 136,636), France, December 6, 2021–February 28, 2022. Ct values refer to the control (nucleoprotein) gene (A and D), 417N mutation (B), and 452R mutation (C). Values are shown as a function of the test outcome (A, B, and C) or the virus lineage (D). P values derived from a t-test where the reference variable is either A0B9C0D1 or BA.1. Boxes within violin plots show the median (horizontal line within box), 50% (box tops and bottoms), and 95% CIs (error bars). Tests were the same as in Figure 3, but only screening tests with Ct <28 were included to ensure robust screening results. Ct, cycle threshold; N, nucleoprotein gene.

Figure 6. Ct values from the SARS-CoV-2 variant-specific screening quantitative PCR tests (N = 136,636), France, December 6, 2021–February 28, 2022. Ct values refer to the control (nucleoprotein) gene (A and D), 417N mutation (B), and 452R mutation (C). Values are shown as a function of the test outcome (A, B, and C) or the virus lineage (D). P values derived from a t-test where the reference variable is either A0B9C0D1 or BA.1. Boxes within violin plots show the median (horizontal line within box), 50% (box tops and bottoms), and 95% CIs (error bars). Tests were the same as in Figure 3, but only screening tests with Ct <28 were included to ensure robust screening results. Ct, cycle threshold; N, nucleoprotein gene.

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Page created: May 03, 2022
Page updated: June 18, 2022
Page reviewed: June 18, 2022
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