Microbiology A 25-year-old man has a negative Dick test and a positive Schick test. These results indicate that he has A Neutralizing antibodies against diphtheria B Neutralizing antibodies against scarlet fever C A defect in cellular immunity D Had the full complement of diphtheria penussis tetanus (DPT) shots as a child 💡 Explanation A 25-year-old man has a negative Dick test and a positive Schick test. These results indicate that he has ✓ Correct Answer: B. Neutralizing antibodies against scarlet fever