What is the most devastating disease in the world?

Answer 1

There are so many horrible diseases in the world, and it's difficult to name the most horrible one, as it differs from a place to another place, for example Heart diseases and cancer may be the most horrible diseases in developed countries, but not in developing or under-developed countries, where infectious disease still comes first.

Answer 2

It is difficult to answer vague, poorly worded questions.

So, with that in mind, here is--at least the beginning of--the list:

Physically most destructive: Hantavirus with cardio-pulmonary syndrome. A hemoragic disease, Hanta has an instance of mortality, believed to be, 100%

Disease causing the greatest number of deaths: The winner here goes to smallpox. An estimated 500 million people have died from smallpox worldwide. This toll is over twice that of malaria and three times that of Bubonic Plague.

Most deadly non-communicable disease: Ischaemic Heart disease, warns the WHO, is the single greatest cause of death by a non-communicable, preventable disease.

Answer 3

maybe poliosis or cancer