Multiple Choice
For the successful development of a vaccine to be used against a pathogen, it is necessary that ________.
A) the surface antigens of the pathogen stay the same
B) all of the surface antigens on the pathogen be identified
C) the pathogen has only one epitope
D) the major histocompatibility (MHC) molecules are heterozygous
Correct Answer:

Verified
Correct Answer:
Verified
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