Social & Preventive Medicine Non immunized susceptible diphtheria contacts should receive: A Erythromycin B Penicillin and diphtheria antitoxin C Penicillin, diphtheria antitoxin and DPT vaccine D No treatment is required 💡 Explanation Non immunized susceptible diphtheria contacts should receive: ✓ Correct Answer: C. Penicillin, diphtheria antitoxin and DPT vaccine