In response to the 2014-2016 Ebola epidemic, the clinical development of a two-dose regimen of vaccines Ad26.ZEBOV and MVA-BN-Filo was accelerated. Approved in 2020 by the European Commission for use in epidemic emergencies, this regimen continues to demonstrate its relevance. An Inserm study led by Rodolphe Thiébaut (Inserm, INRIA, Université de Bordeaux, Vaccine Research Institute) has played a role in evaluating its safety and immunogenicity in healthy adults and in those with HIV and compared different time intervals between the two doses. It has confirmed that this regimen is well tolerated, that the antibodies acquired persist for at least one year, and that they can be easily reactivated by a booster shot. The findings of this trial have been published in Plos Medicine.