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Pre–eruptive Stage
Pre-eruptive Stage Pre–eruptive Stage
There is sudden onset with mild or moderate fever, pain in the back, shivering and malaise. This stage is very brief, and lasting for about 24 hours. In adults, the prodromal illness is usually more severe and may last for about two to three days before the rash comes out.

Eruptive Stage
In children, the rash is often the first sign. It appears on the day the fever starts. The distinctive features of the rash are: Complications with Chicken Pox
In most cases, Chicken Pox is a mild, self–limiting disease. The mortality is less than 1% in uncomplicated cases. However, Varicella may be accompanied by severe complications, particularly in immuno–suppressed patients, and may also occur in normal children and adults. These include hemorrhages (varicella hemorrhagica), pneumonia, encephalitis, acute cerebellar ataxia and Reye’s Syndrome (acute encephalopathy associated with fatty degeneration of the viscera, especially the liver). Maternal Varicella during pregnancy may cause fetal wastage and birth defects such as cutaneous scars, atrophied limbs, microcephaly, and low birth weight. Intrauterine infection occurring near term may cause Typical Varicella in the newborn with varying degrees of severity depending on the transfer of maternal–specific lG antibodies.