Vaccination is a process of injecting a dead or weakened form of a pathogen into the body. How does this help strengthen the immune system?

A vaccine exposes the immune system to a harmless form or part of a pathogen. The immune system can then form memory cells that retain information about it, helping the body recognize and respond more quickly if it encounters the pathogen later. Therefore, the correct choice is C, “It allows the body to keep pathogen information for future infections.”

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