Medical Sciences Research (Medical Journal): Evidence that oregano essential oil can actually dissolve the outer membrane of and destroy the herpes virus: "Effect of essential oils on the enveloped viruses: antiviral activity of oregano oils on herpes simplex virus type I and Newcastle disease virus," Siddiqui, Y.M., et al. Medical Sciences Research 24(3):185-186, 1996.
Journal of Agricultural Food Chemicals: Sivropoulou, Afroditi, et al. "Antimicrobial and cytotoxic activities of Origanum essential oils," J Agric Food Chem 44:1202-1205, 1996.
Baseline of Health Foundation (JonBarron.org): “Numerous studies have shown wild mountain oregano oil (not to be confused with the oregano found in your kitchen) to be a potent antimicrobial. It has been proven useful as an antiviral, antibacterial, and antifungal agent rivaling even pharmaceutical antibiotics such as streptomycin, penicillin, vacnomycin, nystatin, and amphotericin in its ability to eliminate microbes. Remarkably it accomplishes this without promoting the development of drug resistant strains and other problems often attributed to the use of standard antibiotics.”