Having been into the prison many times to advise victims and staff, Tsai can offer numerous insights into the habits and customs of IDUs, helping to explain how the infection spreads in this subculture.
「這些感染者年紀大都在 20 歲左右，大都是因為吸毒而入監服刑，入監前檢驗才知道自己感染了 HIV 病毒，」蔡佩玲說，多次出入監所輔導感染者和獄政人員，讓她對於毒癮者的習慣有了較深的了解。