According to the invention, an anion exchange material is used as an adsorber material for use in the prevention or treatment of serious progressions of infectious diseases, in particular infectious diseases caused by viral infection, fungal infection, or parasitic infection. The adsorber material is preferably contained in an extracorporeal perfusion system and comprises cations or synthetic, semisythetic, or natural polycation chains, which are fixed to carrier materials, wherein polycation chains are in linear or branched form.
