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Find the vertex of the graph of the quadratic function.
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Varicella
A highly contagious viral infection, also known as chickenpox, characterized by a blister-like rash, itching, and fever.
Vesicles
Small fluid-filled sacs or blisters on the skin, which can result from infection, inflammation, or blistering disorders.
Circumscribed Skin Lesions
Localized changes in skin color or texture that are clearly defined and separated from the surrounding skin.
Snellen Chart
A chart used to evaluate visual acuity, identified by its lines of letters decreasing in size.
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