Digestion requires alot of energy. When a person is sick or recovering, solid food digestion drains the body of alot of energy that could be used for recuperation. VEGETABLE juices (especially FRESH with live enzymes provide extremely good nutrition (with fiber supplements) and solid food can be limited or even completely eliminated. Of course ALWAYS drink half your body weight in ounces of water every day---200 pounds>>100 ounces of water---IMPORTANT. Garlic is good to kill germs.