MOSTLY TRUEMultiple studies investigate the antiviral powers of oregano oil and carvacrol, and support their use in sanitization formulas. Most notably, carvacrol could to stop cell replication in antiviral medication-resistant herpes simplex (HSV-1), the common virus that causes cold sores. It was also effective at inhibiting the human respiratory syncytial virus (HRSV), which can lead to pneumonia in children and older adults. Research also shows that oregano oil and carvacrol can work against rotavirus and norovirus, which are responsible for the stomach flu. It is important to note that all these studies introduced carvacrol before inoculation, not after. That means it might help prevent a person from catching the virus, but it is unlikely to have much effect if a person already has a virus in their body.
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