The Pestilence reference article from the English Wikipedia on 24-Jul-2004
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Pestilence

Helping orphans the way you would do it
A pestilence is an epidemic or even a pandemic of a virulent and highly contagious disease. Cholera or Bubonic plague are examples of pestilence.

Pestilence is also one of the Four Horsemen of the Apocalypse, along with War, Famine, and Death.