Social & Preventive Medicine Which of the following statements is true regarding pertussis – A Neurological complication rate of DPT is 1 in 50000 B Vaccine efficacy is more than 95% C Erythromycin prevents spread of disease between children D The degree of polymorphonuclear leukocytosis correlates with the severity of cough 💡 Explanation Which of the following statements is true regarding pertussis - ✓ Correct Answer: C. Erythromycin prevents spread of disease between children