Nts in clinical practice but technical optimization are needed to improve quantification. Human immunodeficiency virus (HIV) enters its host cells following the interaction between the virus envelope glycoprotein (Gp120), the cell surface CD4 receptor, and a chemokine receptor, which may be CCR5 and/ or CXCR4, acting as a coreceptor1. The HIV tropism is defined by the coreceptor(s) use and is corr