Ni et al. [27] analysed 40 individuals with essential hypertension (EHs) aged: 56.14 ± 2.19 years and 40 normotensive healthy participants (NTs) aged: 53.60 ± 3.45 years and also observed a higher percentage of CD3+ CD4+ in EHs than in NTs patients. Here, CD4 is linked to essential hypertension.