Find Paper, Faster
Example:10.1021/acsami.1c06204 or Chem. Rev., 2007, 107, 2411-2502
Prior infection with SARS-CoV-2 boosts and broadens Ad26.COV2.S immunogenicity in a variant-dependent manner
Cell Host & Microbe  (IF21.023),  Pub Date : 2021-10-13, DOI: 10.1016/j.chom.2021.10.003
Roanne Keeton, Simone I. Richardson, Thandeka Moyo-Gwete, Tandile Hermanus, Marius B. Tincho, Ntombi Benede, Nelia P. Manamela, Richard Baguma, Zanele Makhado, Amkele Ngomti, Thopisang Motlou, Mathilda Mennen, Lionel Chinhoyi, Sango Skelem, Hazel Maboreke, Deelan Doolabh, Arash Iranzadeh, Ashley D. Otter, Wendy A. Burgers

The Johnson and Johnson Ad26.COV2.S single-dose vaccine represents an attractive option for coronavirus disease 2019 (COVID-19) vaccination in countries with limited resources. We examined the effect of prior infection with different SARS-CoV-2 variants on Ad26.COV2.S immunogenicity. We compared participants who were SARS-CoV-2 naive with those either infected with the ancestral D614G virus or infected in the second wave when Beta predominated. Prior infection significantly boosts spike-binding antibodies, antibody-dependent cellular cytotoxicity, and neutralizing antibodies against D614G, Beta, and Delta; however, neutralization cross-reactivity varied by wave. Robust CD4 and CD8 T cell responses are induced after vaccination, regardless of prior infection. T cell recognition of variants is largely preserved, apart from some reduction in CD8 recognition of Delta. Thus, Ad26.COV2.S vaccination after infection could result in enhanced protection against COVID-19. The impact of the infecting variant on neutralization breadth after vaccination has implications for the design of second-generation vaccines based on variants of concern.