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.
A second dose of the varicella vaccine should help to improve protection, decrease varicella cases by 22%1, which in turn will reduce the number of children who suffer complications from chickenpox. Two doses of the varicella vaccine are now recommended as part of the childhood schedule where, previously, only one dose was recommended.