CD4 and myalgic encephalomeyelitis/chronic fatigue syndrome: Whether these disturbances primarily affect certain immune subpopulations, estimated decreased for γδ T cells, or increased for plasma and resting CD4 memory T cells, correlating with patient symptom severity in ME/CFS, or reflect the presence of DEHERV profiles in immune cell subpopulations biased in these patient groups is an aspect that awaits further work.