When the virus attacks as shingles, one of its distinguishing characteristics is that it only affects one side of the body. (As shown in the link and verbally identified by a doctor I spoke to). This happens because the nerve cells themselves are infected - and are partitioned on different sides of the body.
At first the rash appears similar to the first appearance of hives; however, unlike hives, shingles causes skin changes limited to a dermatome, normally resulting in a stripe or belt-like pattern that is limited to one side of the body and does not cross the midline. Zoster sine herpete ("zoster without herpes") describes a person who has all of the symptoms of shingles except this characteristic rash.
My question is: What is the name of the category of viruses that affect only one side of the body?