Knowledge center. Chickenpox (Chicken Pox) , also known as Varicella, is a very contagious infection caused by the varicella zoster virus. In several parts of the world it is just known as varicella. Patients develop a blister-like rash, which first appears on the face and trunk, and then spreads throughout the body.
Etymology[edit] Latin. See mode. modus â(plural modi) (law, obsolete) The arrangement of, or mode of expressing, the terms of a contract or conveyance.
L. modalitas, fr. modality. 1. a method of application of, or the employment of, any therapeutic agent, especially a physical agent. 2. in homeopathy, a condition that modifies drug action; a condition under which symptoms develop, becoming better or worse. 3. a specific sensory entity, such as taste.