Social & Preventive Medicine Which of the following regarding oral polio vaccine (OPV) is not true? A Useful in epidemics B Excretion of virus in stools may cause disease to the unimmunized C Rapid antibody response D Protective even in the presence of maternal antibodies 💡 Explanation Which of the following regarding oral polio vaccine (OPV) is not true? ✓ Correct Answer: B. Excretion of virus in stools may cause disease to the unimmunized