Fig. 3From: Effect of a synbiotic on the response to seasonal influenza vaccination is strongly influenced by degree of immunosenescenceNumbers of CD28−CD57+ helper T cells at baseline differ in older subjects randomized to B. longum + Gl-OS and placebo. Data are absolute numbers of T-cell subsets × 1000/ml ± 2SEM for n = 58 young and n = 54 older subjects randomized to B. longum + Gl-OS ■or placebo □. Data were analysed using Student’s independent t-tests for differences between young and older subjects. ** Denotes significant difference between treatment groups within age cohort (p < 0.01)Back to article page