What is claimed is the ornamental design for a cervical immobilization collar, as shown and described.
FIG. 1 is a perspective view of a cervical immobilization collar showing a new design;
FIG. 2 is a front view of the cervical immobilization collar of FIG. 1;
FIG. 3 is a rear view of the cervical immobilization collar of FIG. 1;
FIG. 4 is a right side view of the cervical immobilization collar of FIG. 1; and,
FIG. 5 is a left side view of the cervical immobilization collar of FIG. 1.
The components of the display shown in broken lines illustrate portions of the cervical immobilization collar which form no part of the claimed design. Further, the vertical and diagonal broken lines are not meant to be indicative of any specified colors.