Natural immunity occurs when a person's body:
A. produces antibodies after being exposed to and experiencing all the symptoms of a disease.
B. produces antibodies to a particular disease after he or she is vaccinated against the disease.
C. does not produce antibodies after being exposed to or vaccinated against a particular disease.
D. produces antibodies, even if he or she is not exposed to or vaccinated against a particular disease.
Answer: A. produces antibodies after being exposed to and experiencing all the symptoms of a disease.
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