Polio immunization eradicated the deadly disease decades ago in United States. However, Good.is infographic reveals the disease continues to be a killer in four countries: Afghanistan, India, Nigeria and Pakistan.
In 2003, the government in Nigeria decided to stop vaccinating children in parts of the country. This resulted in a large outbreak of polio that spread not only throughout Nigeria but also to previously polio-free countries in Africa, Asia and the Middle East. (greenfacts.org)