Castiel knows what he means, but covers Dean's heart with a hand, anyway. He tries to summon the power to heal him, still finding it hard to believe it's all fruitless.

"This is the first I've seen you sick," he admits. He's seen Dean bloody and bruised, tubes in his nose, bones broken. Spirit broken. But never a cold.

He supposes this is better, comparatively.

"You're remarkably healthy for someone with such an appalling diet."