Honestly, the whole searching for a cure premise is stupid. You don't randomly fly around to planets of the week and hope to stumble across a cure to an engineered plague. You go after the guys who made it. The chances of stumbling across something useful on a random planet of the week are so low you're better off buying lottery tickets. Instead, hit Drakh research stations. Capture their scientists.
If you're going to keep the plague premise, at least drop the planet of the week bullshit and make it about raids against Drakh holdings.