Leprosy, also called Hansen's disease, could be a microorganism infection caused by Mycobacterium leprae
Severely affected people ar thought to transmit the bacterium by droplets from the mouth or nose, tho' this is often not well outlined.
However, despite its name, infectious disease isn't notably contagious.
Around 95 percent of the world's population is naturally immune and, even after prolonged exposure, will not pick up the disease.