These mice showed no overt anomalies but were unable to cope with viral infections, despite otherwise normal immune responses. (science.sciencemag.org)
Immunosuppression - suppression of normal immune responses. (icatcare.org)
In normal immune responses, a second type of helper cells, known as TH2, secrete another batch of cytokines, including one called interleukin - 4 (IL - 4) that turns off the cytokine release from TH1 cells. (sciencemag.org)