Immunological and Viral Response to Antiretrovirals in HIV Patients With CD4 Cell Count Below 100

Inclusion Criteria: * Diagnosed HIV-1 infection. * Age 18 years or over. * No previous antiretroviral therapy. * CD4 lymphocyte count of \< 100 cells/mL. * Patients who, sufficiently informed, give their written consent to participate in the study and undergo the tests and explorations involved in the study. Exclusion Criteria: * Pregnant women, women who are breast feeding, or women who intend to become pregnant during the study period. * Currently undergoing treatment for an opportunistic infection (parenteral administration). * Any formal contraindication to treatment with the study drugs