IL2 and infection: HDVpatients were studied: untreated and polymerase chain reaction (PCR) positive (n =9), anti-HDV positive and PCR negative (n = 8), and responders to treatment (n = 12).The cytokines, interleukin (IL)-2 (p = 0.0008) and IL-12 (p = 0.02) weredifferentially expressed among the groups and were also correlated (p = 0.0143).Future studies will be conducted with patients at different stages of treatment,associating the viral load with serum cytokines produced, thereby attempting toestablish a prognostic indicator of the infection.