What has prevented polio from becoming eradicated on a global basis?

Question

Quizplus · Accepted Answer

While knowledge of the cause of polio and the development of an effective vaccine have been instrumental in reducing the incidence of polio, public fear and suspicion of the safety of the polio vaccine have been significant barriers to its eradication. The availability of the polio vaccine to developing countries has also been a challenge, but progress has been made in recent years to improve access. There has not been a global suspension of the polio vaccine.

What Has Prevented Polio from Becoming Eradicated on a Global