Healthy carriers are present in all except-: (A) Diphtheria, (B) Pertussis, (C) Typhoid, (D) Cholera
Answer is C. Healthy carriers emerge from sub clinical cases. They are victims of sub clinical cases who have developed carrier state without suffering from overt diseases, but are nevertheless shedding the disease agent. Eg polio, cholera, meningococcal meningitis, salmonellosis, and diphtheria