Leprosy was a death sentence but very prolonged in time and cruel. You had to died as an outcast, with your family and friends rejecting you. You were not only dying alive but alone. While leprosy was uncurable then it can be completely healed today.
Jesus was not afraid however to approach the lepper. He even touched him what was unheard of. This is why Jesus asked the lepper not to tell anyone … Jesus would be afraid to approach Jesus. He wanted to avoid them panicking. It still happened. Some people kept away from Jesus because of this.
We should never let our fears separate us form Jesus. We also have an illness; we often don’t know about, that is eating us from inside. We are slowly dying. It is not a leprosy thou but our sin. It is not the death of our body but the lose of our soul. Jesus is however not afraid to heal us, whenever we come to him.