An illness with acute onset of diffuse (generalized) papulovesicular rash without other apparent cause
Laboratory Criteria For Diagnosis
- Isolation of varicella virus from a clinical specimen, OR
- Significant rise in serum varicella immunoglobulin G antibody level by any standard serologic assay
A case that meets the clinical case definition, is not laboratory confirmed, and is not epidemiologically linked to another probable or confirmed case
A case that is laboratory confirmed or that meets the clinical case definition and is epidemiologically linked to a confirmed or probable case
Two probable cases that are epidemiologically linked would be considered confirmed, even in the absence of laboratory confirmation.