If I must needs glory, I will glory of the things which concern mine infirmities. The God and Father of our Lord Jesus Christ, which is blessed for evermore, knoweth that I lie not. I let down by the wall, and escaped his hands. Demon harassment and affliction can include sickness. See again the Scriptures cited above.
Demons are responsible for many, many sicknesses.
How many, no one can say for sure. Nevertheless, we must know how to engage them in Spiritual Warfare to dispel them and get rid of the sicknesses they cause. The balance of this book addresses this issue. Actually, we will address five major issues in this volume. To learn more about this book, see How to be Healed Using Spiritual Warfare.