The Pneumonic plague reference article from the English Wikipedia on 24-Apr-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Pneumonic plague

The Pneumonic and bubonic plague are the same disease, caused by the bacterium Yersinia Pestis, however the pneumonic form is one that has infected the lungs allowing the disease to become airborne, whereas the bubonic form can only be transmitted by blood.

For information on the plague visit the area on its bubonic form: bubonic plague

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