Can we have no illness? The answer is “yes”. But, most people will think that we are human, made by flesh and blood and it is normal to have illness of any kind. It is true in principle, but, still we can have ways to refuse the visit of sick devil coming into our body.
We can see the life of animals. We know that turtle can live up to one hundred years, crocodile eighty years, elephant sixty years, and bear fifty years and so on. Animals have no medicine and doctor to take care of their health. They have to protect themselves to live their life. They may have illness sometimes, but their body resistance will cure itself and recover by themselves.
But, we are human, who have doctors to stand by to cure us in time of our illness. We will take medicine or injection depending on what kind of illness we suffer.
Our body is made of flesh and blood. When we are hit by some hard articles in our fatal part, we will die. Such accident is difficult to prevent and we can only leave it to the mercy of God.
However, in normal situation, if we control our mouth carefully, let stomach to have ample space to digest, our chance of sickness is very low.
Besides, a prudent life is necessary. That is to have sufficient sleep, balanced food, adequate exercise, to build up a good body resistance. By such a doing, you will be free to live a good healthy life.