“…The second direction is concerned with antiviral activity of 'pure' (non-functionalized) nanoparticles [3][4][5][6][7][8][9][10][11][12][13][14]. There are experimental results of antiviral action of Ag [3][4][5][6], Au [7,11], TiO 2 [8], CuCl 2 [9], CeO 2 [11][12][13][14], SiO 2 [10] nanoparticles against different viruses: influenza virus H3N2 and H1N1 [8,11], hepatitis B virus [3], herpes simplex virus [4,11], HIV-1 [5,6], dengue virus type-2 [9], Foot-and-Mouth disease virus [7], vesicular stomatitis virus [14]. Microscopic studies demonstrated that nanoparticles are adsorbed on the virus surface [6,7], which leads to local transformations of the surface, such as agglutination of glycoproteins [6,7], thus preventing virus penetration into the cell.…”