The ornamental design for a sterilecover, as shown and described.
FIG. 1 is a front perspective view of a sterile cover according to the present invention.
FIG. 2 is a front view of the sterile cover of FIG. 1.
FIG. 3 is a rear view of the sterile cover of FIG. 1.
FIG. 4 is a left side view of the sterile cover of FIG. 1.
FIG. 5 is a right side view of the sterile cover of FIG. 1.
FIG. 6 is a top view of the sterile cover of FIG. 1; and,
FIG. 7 is a bottom view of the sterile cover of FIG. 1.
The dash dot dash broken lines shown in FIGS. 1-7 and the dash dash broken lines shown in FIG. 7 are for the purpose of illustrating portions of the sterile cover that form no part of the claimed design. None of the broken lines form any part of the claimed design.