Illness

Symbalene Blood Burn1
Virulent disease which is capable of killing an entire planetary population in short order, but not as fast as Nomad could.1 Barclay suspected that he was suffering from Symbalene blood burn in 2370, though he was mistaken.2 Earth kept samples of the disease in storage at Cold Station 12 in 2154.3

Yellow text = Canon source

Green text = Backstage source

White text = DITL speculation

References

#	Series	Season	Source	Comment
1	TOS	2	The Changeling
2	TNG	7	Genesis
3	ENT	4	Cold Station 12

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Last updated : 1 Jan 1970

Series:	TOS Season 2 (Disc 1)
Source:	The Changeling

Series:	TNG Season 7 (Disc 5)
Source:	Genesis

Series:	ENT Season 4 (Disc 2)
Source:	Cold Station 12