The chickenpox vaccine is a shot that can protect nearly anyone who receives the vaccine from catching chickenpox. It's also called the varicella vaccine, because chickenpox is caused by the varicella-zoster virus. The vaccine is made from a live but weakened, or attenuated, virus. Viruses that have been attenuated are less virulent than viruses that are not.
The term whole grain refers to a variety of grains, including wheat, corn, rice, oats and rye, which are still in their natural form. Whole grains have a bran, germ and endosperm. To be considered a whole grain, the entire grain must still be intact and not just the endosperm, as is the case in refined grains.
A whole grain contains three segments of a seed -- the endosperm, germ and bran. As the name indicates, oat bran only contains the bran of the seed, which means it is not a complete whole grain. Rolled oats derive from whole oat groats, which are whole grains -- produced when rollers mash down the groats and create flat flakes. Rolled oats are also known as oatmeal.