Figure 3.

Frequencies of human immunodeficiency virus type 1 (HIV-1) RNA–producing lymph node cells per square millimeter, as determined by in situ hybridization for HIV-1 RNA, were significantly higher in men, compared with women. Each symbol represents the sum of the HIV-1 RNA–producing cells from all lymph node sections, divided by the total area examined for an individual subject. A geometric mean of 6 (95% confidence interval [CI], 5–8) sections and 168 mm² (95% CI, 128–222 mm²) of tissue were analyzed per subject. Horizontal lines indicate geometric means.