CCR5 and AIDS: Since HTLV-2 has been pointed as a protective factor for HIV/AIDS progression, probably by cytokines production that blocks the CCR5 coreceptor of HIV [10,31], we could hypothesis that at the beginning of HIV and HTLV-2 coinfection, and/or before antiretroviral therapy (ART), the HIV takes advantage of the HTLV-2 (high viral load levels).