• Arch Med Sci · Jan 2022

    A comparison of the protective effect of vaccination and clinical features between the SARS-CoV-2 wild-type strain and Delta (B.1.617.2) variant.

    • Yanzi Li, Zhi Wang, Junhui Liu, Jianfeng Han, and Lin Yang.
    • Department of Medical Administration, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.
    • Arch Med Sci. 2022 Jan 1; 18 (6): 167816821678-1682.

    IntroductionThis study aimed to investigate the clinical features and vaccine effectiveness of patients with the SARS-CoV-2 wild-type strain and the Delta variant.MethodsWe retrospectively evaluated patients with the SARS-CoV-2 wild-type strain and the Delta variant.ResultsThe Delta-variant group showed a higher infection rate in minors, who had higher incidence of anosmia or dysgeusia and shorter incubation period. Unvaccinated patients had a 15.59-fold higher risk of severe classification than vaccinated patients. The viral clearance time was significantly shorter in the Delta-variant group.ConclusionsThe Delta-variant group show higher transmissibility, and vaccination reduces the incidence of severe classification and promotes viral clearance.Copyright: © 2022 Termedia & Banach.

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