Generality
That the apple is the fruit of the apple tree (botanical name Malus communis) is a fact far from being a novelty, just as the old saying according to which "an apple a day keeps the doctor away" tells us nothing new.
In addition to driving away the company of health personnel, which we would gladly do without in certain situations, it seems that the regular consumption of apples helps to get rid of other, unwanted, companies as well. In the next paragraph we will understand better which ones, describing the nutritional properties of the apple.