Mafia 101. Disputed Island

1. I don't understand why everyone decided that the doctor successfully infected someone. Considering the amputation, I would say that this was more of a description of the infection and a burned trait or a neutral development.
That is, there is a high probability that one of us is slowly dying.

The newspaper says that the arm was amputated precisely to prevent the infection from spreading, and it also mentions that one of the attacked was saved.

2. If a block hits a non-blockable target, the block will still be displayed in the newspaper. So Gur and Ment could be the defender.
3. The old woman is not blockable. So Ment and Gur could very well be the ones blocking her.

I agree about Gur being blocked. But isolation is a bit different; the Master wrote that it affects Milton, and if that's the case, then, in theory, the old woman's poll can also be disrupted by isolation.

I'm still thinking about that unclear description. I don't want to believe that Lucy went around infecting random people.
Question for the Master:
When infecting, is the hint about the role given immediately upon the fact of the infection being displayed, or at the moment of death?