For the successful development of a vaccine to be used against a pathogen,it is necessary that

Question

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For a vaccine to be successful, the surface antigens of the pathogen targeted by the vaccine should remain stable and not change over time. This allows for the development of long-term immunity through memory B and T cells recognizing and responding to the same antigens upon pathogen encounter. If the surface antigens undergo frequent changes, such as in the case of influenza viruses, it becomes necessary to continuously update the vaccine formulation to reflect the new strains.

For the Successful Development of a Vaccine to Be Used