A gemstone is any rock or mineral that could be used for ornamentation or jewelry. Gemstones usually are minerals prized for their color, beauty, rarity, and endurance. Most often, the minerals are cut and polished to bring out the natural beauty of the piece.
The varicella vaccine is a live (attenuated) virus administered to protect against the viral disease commonly known as chickenpox caused by the varicella zoster virus (VZV).he varicella vaccine is marketed as Varivax in the U.S. by Merck and globally as Varilrix by GlaxoSmithKline.
What is the chickenpox vaccine? The chickenpox (varicella) vaccine is a series of two shots that can protect nearly everyone who gets it from chickenpox. The first should be given at the age of 12-18 months; the second shot should be given at 4-6 years of age.