A coated and varnished membrane, the membrane including at least one fabric having at least one side coated with at least one layer of polyvinyl chloride, and at least one varnish film on the coated side of the membrane, the varnish film including a polymeric binder and silver in the form of a silver element less than 250 nm in size. A process for manufacturing a membrane according to the invention. A use of a membrane as a virucide.