Many of those who are infected never develop symptoms. Symptoms, when they occur, may include watery blisters in the skin or mucous membranes of the mouth, lips, nose, or genitals, or eyes (Ocular<unk> . Lesions heal with a scab characteristic of<unk> ic disease. Sometimes, the viruses cause mild or atypical symptoms during outbreaks. However, they can also cause more troublesome forms of<unk><unk> . As neurotropic and neuroinvasive viruses,<unk> -1 and -2 persist in the body by hiding from the immune system in the cell bodies of neurons. After the initial or primary infection, some infected people experience sporadic episodes of viral reactivation or outbreaks. In an outbreak, the virus in a nerve cell becomes active and is transported via the neuron's axon to the skin, where virus replication and shedding occur and cause new sores.
Herpes simplex virus
Cytomegalovirus
Varicella zoster virus
Molluscum contagiosum virus
Mumps virus
Human herpesvirus 6
Treponema pallidum
Coxsackie B virus