Edward Jenner Demonstrated the First Example of Immunological Cross-Protection Because

question 24

Multiple Choice

Edward Jenner demonstrated the first example of immunological cross-protection because:

• A) the smallpox virus was nonpathogenic
• B) the cowpox virus only affected milkmaids
• C) cowpox and smallpox viruses were metabolically different
• D) cowpox virus was structurally similar to the smallpox virus
• E) plague survivors were immune to smallpox

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