Scientists identify breakthrough cases of SARS-CoV-2’s delta variant in fully vaccinated individuals
https://www.news-medical.net/news/20210705/Scientists-identify-breakthrough-cases-of-SARS-CoV-2e28099s-delta-vari
In the current study, the scientists have described the transmission of delta variants among family members who were attending a wedding ceremony with 92 guests. The wedding events were held outside in a large open-air tent, and all guests were fully vaccinate.
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La possibilité d’une absence d’#immunité anti-#sars-cov2 après le #vaccin a été écartée :
Six vaccine breakthrough cases identified in the study highlight the notion that antibodies elicited by Pfizer/BioNTech BNT162b2, Moderna mRNA-1273, and Covaxin BBV152 may not be sufficient to provide full protection against the delta variant. Although some people fail to develop adequate immunity in response to vaccination, none of the patients identified in the study had a history of vaccine failure.
As mentioned by the scientists, mutations in three antigenic regions of the spike receptor-binding domain (450–469 IDf, 480–499 IDg, and 522–646 IDh) could potentially reduce the susceptibility of delta variant to antibody-mediated neutralization.