Prime Timeline
   | Year | Event | 
   | 2164 | 
         ● [1]
         The drug felicium is used to stop a plague on the planet Ornara. The medicine proves to be powerfully addictive, and the whole population of Ornara become addicts. [1]
      
 
         ● [2]
         A group of Doctors is sent to Sauria to find a cure for a plague which is raging on the planet. Amongst them is the highly respected physician, Sobon. [2]
      
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Colour key
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References
| # | Series | Season | Source | Comment | 
| 1 | TNG | 1 | Symbiosis | Two hundred years ago. | 
| 2 |  |  | Star Trek - Rise of the Federation, Book 2 : Tower of Babel |  |