History:The Bacterium
Infectious diseases are caused by bacteria. But during the Middle Ages， millions of people died without knowing the causes. Later， two people founded the bacteriology. And scientists then gradually found the bacteria which led to different infectious diseases. All these scientific harvests helped the doctors and the patients a lot.
- Added：2006
- Country：Germany
- Duration：15
- Time of update：2011/8/17 16:50:26