10 Oldest Known Diseases
In the study of ancient diseases, nothing speaks like the dead. "Bone abnormalities are a strong identification source," said Dr. Anne Grauer, anthropologist at Loyola University Chicago and president of the Paleopathology Association, during a personal interview. So it's relatively easy to date tuberculosis due to the lesions it leaves on bones. Pneumonia may be more ancient than TB, but lung tissue doesn't hold up so well after being buried.
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