World Health Organization gets ready for 'Disease X'

By Susan Scutti, CNN

Updated 1627 GMT (0027 HKT) March 12, 2018

There were 216,000 global cases of leprosy, an ancient and disfiguring disease, in 2013.
Photos: 10 diseases you thought were gone
There were 216,000 global cases of leprosy, an ancient and disfiguring disease, in 2013.
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In the 19th century, scarlet fever was a common killer in Europe. In 2016, nearly 20,000 cases were reported in the United Kingdom -- the biggest increase in 50 years.<br /><br />Scarlet fever is just one disease that many have forgotten but that is by no means gone, despite our best efforts to eliminate it.
Photos: 10 diseases you thought were gone
In the 19th century, scarlet fever was a common killer in Europe. In 2016, nearly 20,000 cases were reported in the United Kingdom -- the biggest increase in 50 years.

Scarlet fever is just one disease that many have forgotten but that is by no means gone, despite our best efforts to eliminate it.
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