Leprosy is a chronic disease caused by a bacillus mycrobacterium leprae. It affects principally the skin, the upper respiratory tract, peripheral nerves in hands & feet, and the eyes.
It is transmitted mainly via droplets from the nose. Some 95% of us have a natural immunity to leprosy. The first sign is a discolored, insensitive patch on the skin, then thickened and palpable cutaneous nerves.
Source: {http://www.stfrancisleprosy.org/what-is-leprosy.html}
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