Two implications can be realized from this study: (1) concerning the HIV/AIDS cohort study in Brazil, we believe no additional transcription of CD4+ T-cell and VL counts from patients’ medical records is necessary, due to a reliable quality in the SISCEL database; (2) and another concerning the health service, with high correlation and agreement of their data, the permanent evaluation of the therapeutic success of the patients can be accomplished, and it is not necessary to carry out specific studies for this purpose. Here, CD4 is linked to AIDS.