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He was left untreated and in agony for 10 days and because of the extent of his injuries both his legs had to be amputated.

Leprosy is curable with a combination of different antibiotics, but if left untreated the patients' health can deteriorate with sores and nerve damage that cause deformities.

If left untreated, it typically migrates through the optic nerve to the brain, eventually metastasizing and taking the life of the child.

"That is unacceptable and right now we are seeing over 20 million tonnes of untreated sewage spilling into our waters," he added.

If untreated, it can lead to late-stage HIV or Aids, the name for a collection of illnesses caused by the virus.