You have no idea how you just crushed my heart.
Someone as animated as Ezio should never lie so still.

And Leonardo all alone, with a berserk, starved Ezio, pretending his growls and snarls are him being himself in his weird, zombie way. Ugh. Why???;__;

THERE WAS HOPE, DAMN IT!
Well, what are the chances they would have made it anyway? I assume the cure wouldn't work instantly and knowing Leo, he'd probably stash Ezio somewhere and run away to be zombie food/distraction while the other healed.