CD8A and influenza: A recent study showed that CMV seropositivity in older adults was associated with 1) an increased frequency of CD8+ T cells expressing senescence-associated cell surface markers; 2) lower frequencies of influenza-specific memory T cells; and 3) an enhanced inflammatory response to influenza infection, but no difference in the memory T cell response to influenza infection when compared to seronegative individuals (van den Berg et al., 2021).