<;P>;PROBLEM TO BE SOLVED: To provide a composition exhibiting enhanced antivirus activities that is nature-derived and safe and hardly causes side effects. <;P>;SOLUTION: The composition comprises a combination of fucoidan derived from seaweed with extracts of Cordyceps sinensis obtained by extraction from cultured products of fungi of Cordyceps sinensis obtained by using germinated soybean as a nutrient medium. The composition exhibits synergistically enhanced antivirus activities. <;P>;COPYRIGHT: (C)2010,JPO&INPIT