The ornamental design for bandage, as shown as described.
FIG. 1 is a perspective view of a bandage, illustrated with an adhesive cover slightly removed, showing my new design;
FIG. 2 is a front elevational view of the invention, illustrated with the adhesive cover slightly removed, the rear being a mirror image thereof;
FIG. 3 is a left-side elevational view of the invention, illustrated with the adhesive cover slightly removed, the right-side elevational view being a mirror image thereof;
FIG. 4 is a top plan view of the invention; and,
FIG. 5 is a bottom plan view of the invention, illustrated with the adhesive cover slightly removed.