No Significant Difference in Viral Load Between Vaccinated and Unvaccinated, Asymptomatic and Symptomatic Groups When Infected with SARS-CoV-2 Delta Variant

This study including a total of 869 samples from two distinct demographic populations in California (Group UeS =500 and Group HYT= 369) were included in the analysis. The results demonstrated there  were no statistically significant differences in mean cycle threshold (Ct) values of vaccinated (UeS: 23.1; HYT: 25.5) vs. unvaccinated (UeS: 23.4; HYT: 25.4) samples.  The mean viral loads as measured by Ct-value were similar for large numbers of asymptomatic and symptomatic individuals infected with SARS-Cov-2 during the Delta surge, regardless of vaccine status, age, or gender. 
https://www.medrxiv.org/content/10.1101/2021.09.28.21264262v2.full-text

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