The effects of age and viral serology on γδ T-cell numbers and exercise responsiveness in humans

•γδ T-cell numbers and proportions decline with increasing chronological age.•Latent CMV infection is associated with increased γδ T-cell numbers in the young.•Exercise evokes an increase in circulating γδ T-cell numbers.•Older subjects have an impaired ability to redeploy γδ T-cells with exercise....

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