This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
[{'content': "Positive schick's test indicates that the person is ? \nSelect and explain. \nA. Immune to diphtheria, B. Hypersensitive to diphtheria, C. Susceptible to diphtheria, D. Susceptible and hypersensitive to diphtheria", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. is c i.e., Susceptible to diphtheria o Shick test is no longer in use. It was used for the susceptibility of for diphtheria. o It was an intradermal test, in which after intradermal injections of diphtheria toxin in one forearm (usually left) and toxoid in other forearm two readings were taken one at 24-48 hrs and second at 5-7 days.', 'role': 'assistant'}]