Social & Preventive Medicine For the prevention of yellow fever, a single vaccination with 17-D nonpathogenic strain of virus gives full protection to the individual for at least A 10 years B 12 years C 15 years D 18 years 💡 Explanation For the prevention of yellow fever, a single vaccination with 17-D nonpathogenic strain of virus gives full protection to the individual for at least ✓ Correct Answer: A. 10 years