Best to simply evade saying anything about Klaus's refusal to give his blood. Admitting that your blood is a precious, one-of-a-kind commodity is not quite in line with wanting to remain his own man rather than a test subject called upon to heal any odd thing. Although with the way the rest of him is not as it once was, it is entirely possible that his blood is not as efficient as it used to be, if it still works at all.

"You might want to get him on board, he has quite the brilliant mind, and a fondness for research and puzzles," Klaus lets Gaius know. Ozzie is just as smart, but as far as Klaus knows, less versed into biology, although he could be wrong. Best to check with him next time Klaus runs into him. In a station this size, it would be soon enough.