Abstract
A balanced immune response to a viral pathogen leads to clearance of the virus while limiting immune mediated pathology. Control of this process occurs at all stages of the immune response, including during the induction of an antiviral response, clearance of virally infected cells, and the resolution of this response. Regulation of antiviral immune response is further modified when the immune system fails to clear the pathogen and by the nature of chronic infection itself. A number of processes have been implicated in the regulation of antiviral immune responses, such as the limitation of viral antigen load by interferons, apoptosis through cytokine withdrawal or Fas-mediated killing, and control of these responses by regulatory T cells. This review addresses several of these mechanisms.
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