An antiviral composition comprising: a thiosulfate salt and at least one of thiosulfate complex salt of a metal and a porous particulate carrier; said metal being at least one selected from the group consisting of silver, copper and zinc; said salts being carried on said porous particulate carrier. It is applicable to a wide range of living environment such as medical instruments and appliances, hygienic implements as well as kitchen utensils, and also demonstrates an antibacterial activity in addition to the antiviral activity. The composition releases its salts slowly to the environment and the antiviral and antibacterial activities of said composition lasts for a long period of time. A method for preparing said composition as well as an antiviral disinfection method and a virucidal disinfection fluid using said composition are also disclosed.
