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- Explain one mechanism of antibody action against viruses.How different are theactions of antibodies againstbacteria and against virus?Why is the cellular immuneresponse activated in case ofchronic viral infection?Explain the mode of action of the herpes viral RNAs and how they confound the immune system.
- Describe the development of antibodies to a specificantigen.Viruses have countered the specific immune defense systems by developing “disabling” or “evasion” strategies at various levels of the immune response. Identify and explain twoExplain why HIV targets certain cell types, and describe the ?effects this virus has on the immune system?
- Refer to figures and compare and contrast how both viruses use surface receptors to evade an immune reaction and neutralizingantibodies.“Type I interferons serve as the first line of defence against viral infections”. Give a schematic representation of their mechanism of action and also explain how they interfere with viral replication.Explain how the pathogenesis of Epstein-Barr virus (EBV) leads to the presence of heterophile antibodies in the patient’s blood.