Jesus is the only one in the world who can save people. A sinful man needs a saviour, not a religion. Not only is the human body healed from physical illness through the name of Jesus, but more importantly, souls are also saved from spiritual illness (that is, sin) through the name of Jesus.
Some ask: Why do Christians preach so much? Why don't they let other people follow their own religion? The reason is that faith in Jesus Christ leads to the salvation and life. Therefore, followers of Jesus Christ have a mission to convey this important news to the world.