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• W4385693710 endingPage "e1010721" @default.
• W4385693710 startingPage "e1010721" @default.
• W4385693710 abstract "The impact of variants of concern (VoC) on SARS-CoV-2 viral dynamics remains poorly understood and essentially relies on observational studies subject to various sorts of biases. In contrast, experimental models of infection constitute a powerful model to perform controlled comparisons of the viral dynamics observed with VoC and better quantify how VoC escape from the immune response. Here we used molecular and infectious viral load of 78 cynomolgus macaques to characterize in detail the effects of VoC on viral dynamics. We first developed a mathematical model that recapitulate the observed dynamics, and we found that the best model describing the data assumed a rapid antigen-dependent stimulation of the immune response leading to a rapid reduction of viral infectivity. When compared with the historical variant, all VoC except beta were associated with an escape from this immune response, and this effect was particularly sensitive for delta and omicron variant (p<10 −6 for both). Interestingly, delta variant was associated with a 1.8-fold increased viral production rate (p = 0.046), while conversely omicron variant was associated with a 14-fold reduction in viral production rate (p<10 −6 ). During a natural infection, our models predict that delta variant is associated with a higher peak viral RNA than omicron variant (7.6 log 10 copies/mL 95% CI 6.8–8 for delta; 5.6 log 10 copies/mL 95% CI 4.8–6.3 for omicron) while having similar peak infectious titers (3.7 log 10 PFU/mL 95% CI 2.4–4.6 for delta; 2.8 log 10 PFU/mL 95% CI 1.9–3.8 for omicron). These results provide a detailed picture of the effects of VoC on total and infectious viral load and may help understand some differences observed in the patterns of viral transmission of these viruses." @default.
• W4385693710 created "2023-08-10" @default.
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• W4385693710 date "2023-08-09" @default.
• W4385693710 modified "2023-10-18" @default.
• W4385693710 title "Impact of variants of concern on SARS-CoV-2 viral dynamics in non-human primates" @default.
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• W4385693710 doi "https://doi.org/10.1371/journal.pcbi.1010721" @default.
• W4385693710 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37556476" @default.
• W4385693710 hasPublicationYear "2023" @default.
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