The ornamental design for a medicalapron, as shown and described herein.
FIG. 1 is a front view of the medical apron showing my new design;
FIG. 2 is a back view of the medical apron showing my new design;
FIG. 3 is a left side view of the medical apron showing my new design; and,
FIG. 4 is a right side view of the medical apron showing my new design.
The broken lines running parallel to the upper edges and side edges of the medical apron illustrate stitching and form part of the design, and the broken lines illustrating a belt feature are for environmental purposes only and form no part of the claimed design.