<prompt> Which of the following statements is true regarding peusis?Neurological complication rate of DPT is I in 50000Vaccine efficay is more than 95Erythromycin prevents spread of disease between childrenThe degree of polymorphonuclear Leukocytosis correlates with the severity of cough  <response>: Neurological complications of DPT vaccine is due to peussis component. The estimated risk is 1: 170000 doses administered. Vaccine efficacy is 85. Although several antibiotics are effective against B.peussis, erythromycin is the drug of choice Reference : Park;s Textbook of preventive and social medicine, 24th edition.Pg no.174 