Our 4 "quadrants of life", the spiritual, mental, emotional and physical, function as one permeating and co-operative scheme. These quadrants differ in vibration level, and most individuals may only realize the physical.
What bears on one-quadrant effects the others, and being cognizant of how this occurs will help a good deal in accomplishing a wholesome balance. On the physical level, viruses and microbes are still not the true cause, but the deficiency of suitable nutrition and exercise that enables our bodies to be resistant to them. Viruses and microbes are in and around us day in and day out, even in healthy individuals.