To answer your question, no. When he was studying the old dude dying from cancer he asked Andrea to assist him. Andrea tried to tell what happens but he didn’t believe her. He nearly got himself bit until Andrea capped his dead ass.
He was trying to determine if they had any sense of the their past life before crossing over. He had been conditioning the old dude to music and checking his responses. When the old fart died he played the same music but all the guy wanted to was eat flesh.
Right. The only “partial cure” that we’ve seen is cutting off Herschel’s leg.