Fig. 3From: The impact of circadian rhythms on the immune response to influenza vaccination in middle-aged and older adults (IMPROVE): a randomised controlled trialAntibody titers pre-vaccination and post-vaccination for the two age groups. A-C The geometric mean (95% CI) for antibody titers of A/H1N1, A/H3N2 and B/Victoria strain for aged 50–60 years. D-F The geometric mean (95% CI) for antibody titers of A/H1N1, A/H3N2 and B/Victoria strain for aged 65–75 yearsBack to article page