RNA viral loads of SARS-CoV-2 Alpha and Delta variants in nasopharyngeal specimens at diagnosis stratified by age, clinical presentation and vaccination status

J Infect. 2022 Apr;84(4):579-613. doi: 10.1016/j.jinf.2021.12.018. Epub 2021 Dec 22.
No abstract available

Keywords: B.1.1.7 variant; B.617.2 variant; COVID-19; SARS-CoV-2 RNA load; Upper respiratory tract.

Publication types

  • Letter
  • Research Support, Non-U.S. Gov't

MeSH terms

  • COVID-19*
  • Humans
  • RNA, Viral / genetics
  • SARS-CoV-2* / genetics
  • Vaccination
  • Viral Load


  • RNA, Viral

Supplementary concepts

  • SARS-CoV-2 variants