Another approach is to induce immunity by presenting polysaccharides or oligosaccharides that represent viral glycoproteins of a specific, or numerous, pathogen(s) to B- and T-cells. These cells will recognize the xenobiotic polysaccharide and activate the immune system cascade and recognize further viruses and eliminate them. If successful, memory cells will be formed and become active when the antigen-antibody, polysaccharide-lectin, interaction occurs in a future infection.