(0516 Corridor, 0506 Ian; X664532-3; Red Zone)

When first colonized from Ian in the late 100's, Raiga had a thin tainted atmosphere.  Volcanoes were broken open to raise the atmosphere density and bacteria were sown to remove the taint from the air.  However, an unforeseen burst of radiation from Raiga's primary caused some of the bacteria to mutate into a deadly strain.  While the original taint had largely been removed, the mutated bacteria proved fatal to most human inhabitants.  A few managed to develop an immunity to the bacteria - these "immunes" have multiplied to become a sizeable population, but the planet is quarantined to non-natives.  Nor can the natives leave, since they are carriers of the deadly bacteria Lucellia Raigae.

-EA cor