Success is the sum of small efforts repeated day in and day out.— Robert Collier

Why Do We Fall Ill — quick quiz

5 real SOF NSO questions on Why Do We Fall Ill. Instant scoring and solutions, no signup — see where you stand in ~3 minutes.

Question 1 of 5

MEDIUM

A vaccination programme is being conducted in a village to protect children from polio. How does vaccination work to prevent disease?