The present invention provides cytotoxic Epstein-Barr virus T-cell epitopes. The switch distributes a command for start of generation of snapshots to the plural file servers, which file servers formulate respective snapshots responsive to the command for start of formation of the snapshots. A second surface of the discontinuous layer of absorbent material is in at least partial contact with a first surface of the substrate layer. The first grounding wire connects the active surface and the second surface.