<prompt> Which among the following is not true regarding diphtheria carriers?Immunization prevents carrier stateNasal carriers are not dangerousTreatment of contacts is necessaryThey are responsible for the transmission of the disease.  <response>: Immunization doesnt prevent carrier state. It only prevents infection. Human carriers are the main reservoir of infection. Infected patients and asymptomatic carriers can transmit C diphtheria respiratory droplets, nasopharyngeal secretions, and rarely fomites. The greatest propoion of carriers is in the age group 1 to 5 years, and owing to the small size and anatomical complexities of the nasal passages, the pathological conditions tend to persist and make examination and treatment difficult. Treatment of contacts is necessary. 