Social & Preventive Medicine All of the following are true about herd immunity, EXCEPT: A It can be achieved by immunizing a population with a vaccine that interrupts transmission B The live virus in the vaccine can replicate in the immunized person and spread to other members of the population C Herd immunity can be achieved only by vaccines. D The vaccine must prevent transmission of the virus as well as prevent disease. 💡 Explanation All of the following are true about herd immunity, EXCEPT: ✓ Correct Answer: C. Herd immunity can be achieved only by vaccines.