Here is a clear example of what happens...
Say you have a colony world of Pratax 3 - One colony of 10,000 pop, in a enclosed domed city complex on a mining facility / complex on the world with a type D Star Port
A 400 ton Armed Free Trader jumps into system with a Auto distress beacon on and tumbling away from the system jump point....a System Defense Boat is dispatched to see what is wrong:
The System Defense Boat reaches the 400 Ton Free trader and boards her, finds the 6 man crew all dead from some "sickness" and the atmosphere is frozen...7 of the 12 Low Births are in use and working correctly..The ship is taken back to the Star Port and put into quarantine. After 2 weeks the 7 in Low Births are awakened still in quarantine but that is when the plague starts....
The plague spreads 24-48 hrs after the exposure to the whole 10,000 pop
Within 1-2 days everyone has fallen ill, and in 1-2 days latter everyone has fallen into a comma.
After 3-5 days of falling into a comma
Then the real fun begins...after the pop comes out of the comma, that will...there are 7,000 dead infected corpses
Some 2,500 pop awaken and are extremely weak and scrared, and the dead are everywhere, but wait there is something not right. Some 400 pop have also come out of their comma and are crazed, and attack everyone and everything in sight and they are trying to eat anything living. To kill and eat living flesh.
Next in the dark places and at night some 100 pop come out and they too will attack anything living even the Crazy ones and Eat them to. Anyone bitten and survives falls ill again, and they too seem to mutate into one of these sub-humans that dwell in the dark places and eat flesh.
Yikes the world is cursed....!!!
OH if a Type C Mutant Plague victom bites a non-human, then the plague can spread to that other race too.
Penn