Chronic opioid use is associated with higher antibody response to influenza vaccination in people living with HIV. - Dang CM; Nelson CM; Pahwa RN; Tookes HE; Feaster DJ; Singh P; Rodriguez AE; Forrest DW; Nakamura N; Ghanta PP; Jayaweera DT; Iyer A; et al. (Frontiers in immunology, 2025)