 [ Symptoms ] what is leaparcy and the cause  i have only read about leapers in the bible never knowing what specifically caused the extradition of humans i recently saw a tv program and this topic came up this was my first time hearing of it what i do know its some form of skin disease what specifically is leaparcy and the cause why would people still be outcast is there a treatment yet [ Disease ] pneumonia is an infection of one or both lungs which is usually caused by bacteria viruses or fungi prior to the discovery of antibiotics one third of all people who developed pneumonia subsequently died from the infection currently over 3 million people develop pneumonia each year in the united states over a half a million of these people are admitted to a hospital for treatment although most of these people recover approximately 5 will die from pneumonia pneumonia is the sixth leading cause of death in the united states