The present invention relates to an antiviral pharmaceutical composition, a health functional food composition and a cosmetic composition containing a water-soluble extract of Saururus chinensis or a fraction thereof as an active ingredient. The water-soluble extract of Saururus chinensis or the fraction thereof has an excellent antiviral effect on viruses, especially adenovirus and herpesvirus. Therefore, compositions containing the water-soluble extract of Saururus chinensis or the fraction thereof as an active ingredient may exhibit excellent virus infection prevention and infection alleviation or therapeutic effects.
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