Jenner's successful use of cowpox virus as a vaccine against the smallpox virus is due to the fact that a. the cowpox virus made antibodies in response to the presence of smallpox. b. cowpox and smallpox are caused by the same virus. c. the immune system responds nonspecifically to antigens. d. there are some antigenic determinants common to both pox viruses. e. cowpox and smallpox are antibodies with similar immunizing properties.
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Step 1: Cowpox and smallpox are caused by the same virus, which means they share certain antigenic determinants. Show more…
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We now know that cowpox and smallpox have similar antigens. How does this fact explain why exposure to cowpox enables a person to develop immunity to smallpox? The high variability of cowpox antigens trains the immune system to recognize antigens of many viruses. Memory cells created in the adaptive immune response to cowpox recognize smallpox antigens due to their similarity. The innate immune response to cowpox leads to smallpox immunity due to their similar antigens.
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