Viral diseases such as those caused by cytomegalovirus, herpes simplex and herpes zoster virus.

An important safety issue related to the varicella vaccine is the impact on the epidemiology of herpes zoster both in vaccinees as well as in individuals previously infected with wild-type varicella.

Herpes zoster ophthalmicus presents with an erythematous, macular rash around the eye of the affected dermatome and does not cross midline.