CD8A and sexually transmitted disease: Considering the 12 patients together, there were no statistically significant differences in the VL doubling time among those patients eliciting a strong CD8 response compared to those eliciting a weak CD8 response (p = 0.530, p = 0.180, p = 1, p = 0.283 for 1st, 2nd, 3rd, 4th STI respectively).