PHARMACEUTICAL AND VETERINARY PREPARATIONS, NAMELY, PREPARATIONS TO TREAT AND/OR PREVENT DISEASES INDUCED BY INFECTIOUS AGENTS SUCH AS VIRUSES, PREPARATIONS TO TREAT AND/OR PREVENT TUMOR DISEASES, PREPARATIONS TO STIMULATE THE IMMUNE SYSTEM, PREPARATIONS TO MODULATE THE IMMUNE SYSTEM, PREPARATIONS ALLOWING THE TRANSIENT EXPRESSION OF THERAPEUTIC GENE PRODUCTS AFTER ADMINISTRATION OF SAID PREPARATIONS TO TREAT DISEASES IN WHICH THE TRANSIENT EXPRESSION OF THE THERAPEUTIC GENE PRODUCT HAS A BEN...