Plasma samples (1:100 dilution) from 16 participants from the study located in Thailand, who became infected with CRF01_AE were analyzed (pre-infection and at 7, 12, and 24 weeks following first positive test for HIV-1 RNA) by SPR for the presence of V2-specific antibodies using N-linked biotinylated full-length cyclic V2 peptide based on the sequence of CRF01_AE strain 92TH023 (Figure 1a). The gene discussed is TRGV9; the disease is infection.