Question

chapter 18 guided reading questions (a) when injected, a vaccine provokes an blank response. this may cause minor symptoms, but is not capable of causing infection.

Explanation:

Vaccines work by stimulating the body's immune system. When a vaccine is injected, it contains weakened or inactivated pathogens (or parts of them) that trigger an immune response. The key term here related to the body's defense mechanism against foreign substances like vaccine components is "immune". So the vaccine provokes an immune response, which prepares the body to fight the actual pathogen if encountered later, and the vaccine itself doesn't cause the full - blown infection.

Answer:

immune