FIG. 1.

Clinical, virological, and behavioral data for LSC63, P63, and PP63. (A) Numbers of unprotected sexual contacts, viral loads, and CD4⁺ T-cell counts of LSC63. For the numbers of unprotected sexual contacts, the blue line shows reported sexual contacts with P63, the green line shows reported sexual contacts with other partners, and the horizontal line sections represent the total number of unprotected sexual contacts reported by LSC63 during the periods encompassed. (B) Viral loads and CD4⁺ T-cell counts of subjects PP63 and P63. For both panels, the areas shaded gray represent the period in which LSC63 had frequent unprotected sex with P63 and the black dashed lines indicate a viral load level of 50 copies/ml., onset of acute symptoms of viral infection; *, seroconversion;, viral sequences covering nearly the entire HIV-1 coding region were obtained; ▾, viral sequences of env C2-V5 were obtained.