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

Question

Quizplus · Accepted Answer

For a vaccine to be effective, the surface antigens of the pathogen should remain stable so that the immune system can recognize and respond to them effectively.

For the Successful Development of a Vaccine to Be Used