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.
There have been 2 published studies of the postexposure effectiveness of varicella vaccine. In a prospective observational study, Salzman and Garcia [ 25 ] followed 10 susceptible siblings from 7 households who were given a single dose of varicella vaccine within 3 days after household exposure to varicella (table 1).