Tag: Giovanni Battista Grassi
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Onchocerciasis, a continuing cause of blindness
Among the various illnesses that deprive humans of their sight, onchocerciasis ranks highest. It affects millions of people in sub-Saharan Africa, as well as substantial numbers in Yemen and isolated areas of Brazil and Venezuela. Transmitted by infected blackflies that breed near fast-flowing streams and rivers, it is commonly known as “river blindness.” The disease…