Apples actually have properties that resemble those of penicillin. Fresh apple juice or fresh apple sauce can successfully fight infections such as stomach flu, and polio viruses.
Apples also help prevent cavities in your teeth: Eat a thin apple slice or two after every meal, or snack, and it will reduce the danger of cavities substantially.
Strawberry extract, raspberries, blueberries and wild cranberries all have antiviral properties and can fight intestinal viruses, including the herpes simplex virus, and the polio virus. Generally speaking, berries have a cleansing effect on the blood.