Viral-Induced Leukocyte Interferon in Vesicle Fluid from Lesions of Recurrent Herpes Labialis

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Abstract
Antiviral activity characterized as human interferon (HuIFN) was demonstrated in vesicle fluid from lesions of recurrent herpes labialis in 18 of 19 otherwise healthy patients. High titers (geometric mean, 20,200 units) were present during the early course of lesion development. Antiviral activity in vesicle fluid was neutralized by antibody to leukocyte (type I) HuIFN (HuIFN-α) in the eight patients in whom it was tested. These results indicate that HuIFN-α is present in the local lesions of recurrent herpes labialis. HuIFN may have a role in the pathogenesis of recurrent herpesvirus infections.