The present invention relates to a means consisting of a micro- and/or nanofibrous fabric with quaternary nitrogen grafted by radiation thereon wherein the amount of the quaternary nitrogen is in the range of about 1 to about 30 percent by weight, based on the total weight of the micro- and/or nanofibrous fabric. The means further comprises colloidal silver and/or silver added sulfadiazine and/or silver bound to a thiol functional group of bifunctional anion exchange resin in an amount of about ...