Before anyone points this out, just realized I accidently genned out the Med Bays to X and Advanced Med Bay to 15. To make the Drahk plague work properly, delete Med Bays V-X and in the text for the Advanced Med Bay change all '15's to '5's. In effect, this makes a plague level 5 the Drahk plague and it can only be cured by finding the 'Cure for Nano-Virus' in a ruins. Another thing to mention, the plague bombs go from I-X, but only achieve Plague 4 (with varrying damage and range) and the Drahk Plague I-X goes from Plague 3 to 5, allowing them to start with a more powerful plague than anyone can easily cure right away (if they choose to use it) and lets them develop the dreaded Plague 5.
Not sure how you want to handle this in the Sci-Fi mod, it's too bad we can't increase to Plague 6
