<p>The percentage of carboxyfluorescein succinimidyl ester (CFSE) positive cells was used to assess the proliferative capacity of lymphocytes after stimulation with phytohemagglutinin, (PHA), anti-CD3 and-CD28, Pokeweed mitogen and Tetanus toxoid. Comparisons were made between uninfected controls (blue), HIV+IRP- (purple) and HIV+IRP+ (red). Statistical significance was determined using the Mann–Whitney U test. *p<0.05, **p<0.01, ***p <0.001.</p
