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If a person is vaccinated against a disease sometime in the past, which of the following is currently in your body? | |
A. | The disease organism itself and antigens for the disease organism [Wrong Answer] |
B. | A very high level of antibodies against the disease antigens [Wrong Answer] |
C. | Memory B lymphocytes for the antigen of this disease organism [Wrong Answer] |
D. | All of the above [Correct Answer] |