How Many Known Diseases Are There In The World?

The focus is really on rare diseases, but a credible case can be made that there are at least 10,000 diseases in the world, though there is likely more.

And there are a bit over 500 treatments.

How many diseases are there in the world?

There are four main types of disease: infectious diseases, deficiency diseases, hereditary diseases (including both genetic diseases and non-genetic hereditary diseases), and physiological diseases.

How many diseases are there known to man?

Scientists currently estimate that over 10,000 of human diseases are known to be monogenic.

What are the 10 most common diseases?

  • Unintentional injuries.
  • Chronic lower respiratory disease.
  • Stroke and cerebrovascular diseases.
  • Alzheimer’s disease. Deaths in 2017: 121,404.
  • Diabetes. Deaths in 2017: 83,564.
  • Influenza and pneumonia. Deaths in 2017: 55,672.
  • Kidney disease. Deaths in 2017: 50,633.
  • Suicide. Deaths in 2017: 47,173.

How many rare diseases are there in the world?

There are between 5 000 and 8 000 rare diseases, most of them with a genetic basis. 1 A very rough estimate would be that one out of 15 persons worldwide could be affected by a rare (“orphan”) disease – 400 million people worldwide, of whom 30 million are in Europe and 25 million in the United States.

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