Antimicrobial preparations for creating a protective barrier against microorganisms; antimicrobial spray liquid for creating a protective barrier against microorganisms; antimicrobial gel for creating a protective barrier against microorganisms; antimicrobial aerosol for creating a protective barrier against microorganisms; antimicrobial cream for creating a protective barrier against microorganisms; articles impregnated or coated with antimicrobial preparations for creating a protective barr...