For the Successful Development of a Vaccine to Be Used

Question

For the successful development of a vaccine to be used against a pathogen,it is necessary that
A)the surface antigens of the pathogen not change.
B)a rearrangement of the B cell receptor antibodies takes place.
C)all of the surface antigens on the pathogen be identified.
D)the pathogen has only one epitope.
E)the MHC molecules are heterozygous.

Accepted Answer

If the surface antigens of the pathogen change, the vaccine developed against the original surface antigens may become ineffective as it will no longer be able to recognize the pathogen. It is important that the surface antigens remain constant for the vaccine to be effective.