What is the difference between whole milk and sterilized milk?

Answer 1

You are talking about 2 different things. Whole milk is milk that has not been "skimmed" or had its milk fat removed. Whole milk contains about 4% milk fat, while reduced-fat milk varieties may contain 1 or 2% milk fat. Skim milk has no milk fat left, and is also called "fat free" milk.

Pasteurization is the sterilization process by which foods, including milk, are treated in order to kill pathogens which can cause disease. Any variety of milk may be pasteurized. In fact, whole, 2%, 1% or skim pasteurized milk are widely available in most grocery stores in the United States and Canada.