Deal With The Devil
That's the fifth one dead, and several are gravely ill. A disaster of this scale has never affected my crew, my ship before.
Poor, poor Enterprise.
It's viral, infectious. It's spreading like wildfire. McCoy is exhausted, and may have contracted it himself. If this is true, we'll all be dead within a couple of weeks.
I'm glad my crew don't know what I know. I'm glad that they are safely ignorant. Because I know how to obtain a cure, and save my crew. I know how to fix this problem.
I must trade my life for those of my crew.