Social & Preventive Medicine Cholera transmission by -a) Food transmitsb) Vaccination gives 90% efficiencyc) Healthy carrierd) Chlorination is not effective A a B bc C ac D b 💡 Explanation Cholera transmission by -a) Food transmitsb) Vaccination gives 90% efficiencyc) Healthy carrierd) Chlorination is not effective ✓ Correct Answer: C. ac