Frontiers in Immunology (Sep 2022)

Breakthrough infections with the omicron and delta variants of SARS-CoV-2 result in similar re-activation of vaccine-induced immunity

  • Arne Søraas,
  • Gunnveig Grødeland,
  • Gunnveig Grødeland,
  • Beathe Kiland Granerud,
  • Beathe Kiland Granerud,
  • Beathe Kiland Granerud,
  • Thor Ueland,
  • Thor Ueland,
  • Thor Ueland,
  • Andreas Lind,
  • Børre Fevang,
  • Børre Fevang,
  • Sarah L. Murphy,
  • Sarah L. Murphy,
  • Camilla Huse,
  • Camilla Huse,
  • Anders Benteson Nygaard,
  • Anne Katrine Steffensen,
  • Anne Katrine Steffensen,
  • Huda al-Baldawi,
  • Mona Holberg-Petersen,
  • Lise Lima Andresen,
  • Camilla Ågnes,
  • Trine Ranheim,
  • Ylva Schanke,
  • Mette Istre,
  • John Arne Dahl,
  • Adity Chopra,
  • Susanne Dudman,
  • Susanne Dudman,
  • Mari Kaarbø,
  • Jan Terje Andersen,
  • Jan Terje Andersen,
  • Eline Benno Vaage,
  • Trung The Tran,
  • John Torgils Vaage,
  • John Torgils Vaage,
  • Annika E. Michelsen,
  • Annika E. Michelsen,
  • Fredrik Müller,
  • Fredrik Müller,
  • Pål Aukrust,
  • Pål Aukrust,
  • Pål Aukrust,
  • Pål Aukrust,
  • Bente Halvorsen,
  • Bente Halvorsen,
  • Tuva B. Dahl,
  • Tuva B. Dahl,
  • Jan Cato Holter,
  • Jan Cato Holter,
  • Fridtjof Lund-Johansen,
  • Fridtjof Lund-Johansen

DOI
https://doi.org/10.3389/fimmu.2022.964525
Journal volume & issue
Vol. 13

Abstract

Read online

BackgroundResults showing that sera from double vaccinated individuals have minimal neutralizing activity against Omicron have been interpreted as indicating the need for a third vaccine dose for protection. However, there is little information about early immune responses to Omicron infection in double vaccinated individuals.MethodsWe measured inflammatory mediators, antibodies to the SARS-CoV-2 spike and nucleocapsid proteins, and spike peptide-induced release of interferon gamma in whole blood in 51 double-vaccinated individuals infected with Omicron, in 14 infected with Delta, and in 18 healthy controls. The median time points for the first and second samples were 7 and 14 days after symptom onset, respectively.FindingsInfection with Omicron or Delta led to a rapid and similar increase in antibodies to the receptor-binding domain (RBD) of Omicron protein and spike peptide-induced interferon gamma in whole blood. Both the Omicron- and the Delta-infected patients had a mild and transient increase in inflammatory parameters.InterpretationThe results suggest that two vaccine doses are sufficient to mount a rapid and potent immune response upon infection in healthy individuals of with the Omicron variant.FundingThe study was funded by the Oslo University Hospital, and by grants from The Coalition for Epidemic Preparedness Innovations, Research Council of Norway (no 312780, 324272), South-Eastern Norway Regional Health Authority (no 2019067, 2021071, 10357, 2021047, 33612, 2021087, 2017092), EU Horizon 2020 grant no 848099, a philantropic donation from Vivaldi Invest A/S, and The European Virus Archive Global.

Keywords