The immunological interplay between vaccination and the intestinal ... - Nature.com
Vaccination is the most cost-effective life-saving medical intervention 1 . However, substantial variation in individual immune responses to vaccination exists 2 . Lower vaccine immunogenicity, especially to oral vaccines, is often reported in developing countries 3,4,5 . Many intrinsic and extrinsic factors, such as age, genetics, pre-existing immunity, nutritional status and comorbidities contribute to the variations in vaccine responses 6 . Growing evidence shows that the composition of the intestinal microbiota, which is known to play an important role in the development and regulation of immune responses 7 , influences responses to vaccination 8,9,10 . Studies which have investigated this have shown that a higher relative abundance of the phylum Actinobacteria is consistently associated with higher vaccine responses and a higher relative abundance of Bacteroides with lower responses, while the association between the relative abundance of the phyla Firmicutes and...