Mafia 101. Disputed Island

Okay, in the end, everything falls into place.
Lee killed Menta and Drakoshka, Zero Vish, and someone else we'll find out about soon.
But I still don't understand what the mana does? Nothing? If he had been infected on the first night, he would have already died... Unless

One was found almost immediately. I noticed a couple of serious injuries on him, but there were no signs of bites. I ordered him to return to the camp immediately, where he could receive the necessary assistance.

Mana was healed on the 4th night.