Ct values from SARS-CoV-2 diagnostic PCR assays should not be used as direct estimates of viral load

J Infect. 2021 Mar;82(3):414-451. doi: 10.1016/j.jinf.2020.10.017. Epub 2020 Oct 24.


Image, graphical abstract

Keywords: C(t); COVID-19; SARS-CoV-2; qPCR.

Publication types

  • Letter
  • Comment

MeSH terms

  • COVID-19*
  • Clinical Laboratory Techniques
  • Humans
  • Polymerase Chain Reaction
  • RNA, Viral / genetics
  • SARS-CoV-2*
  • Viral Load


  • RNA, Viral