Polio is an infectious disease caused by the polio virus.  It is passed by poor or careless hygiene that enters the body orally. The most common affects of polio are fever, where the most severe affects can result in permanent paralysis or cause difficulty in breathing, which can result in death.

Four countries remain polio endemic: India, Pakistan, Nigeria, and Afghanistan.

Polio will continue to threaten children everywhere as long as it exists somewhere.  In this age of global travel, a new outbreak of polio might only be a plane ride away.