Ab responses against HTLV-I Gag, Env, and Tax from NDs, ACs, and ATL and HAM/TSP patients in Jamaica. The data were obtained from 167 NDs, 133 ACs, 90 ATL patients, and 49 HAM/TSP patients. Each HTLV-I–infected group showed significantly higher responses for HTLV-I Gag, Env, and Tax compared with NDs (P < .0001 for all 3 proteins). The horizontal line represents the median. *P < .01; **P < .001; ***P < .0001.