We claim the ornamental design for the medical protective shield, as shown and described.
FIG. 1 is a front perspective view of our new design for a medical protective shield, featuring the top, front, and right sides thereof;
FIG. 2 is a rear perspective view of our new design for a medical protective shield, featuring the top, rear, and right sides thereof;
FIG. 3 is a left side elevation view thereof;
FIG. 4 is a front elevation view thereof; and,
FIG. 5 is a rear elevation view thereof.
The broken line showing of parts of the drawings is included for the purpose of illustrating use and environment and forms no part of the claimed design.