If a person is vaccinated against a disease sometime in the past, which of the following is currently in your body?

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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? Answer: All of the above

Question context

This question is part of 🧬 Biochemistry within the broader 🧬 Medical Science subject and appears in the DemoPaper-Pakistan preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.