This is a chickenpox scab (left), and smallpox scab (right) viewed in profile, as a demonstration in comparative morphology. See PHIL 3327 for another comparative view of a chickenpox and smallpox scab. It is important to not, that unlike smallpox, chickenpox lesions are superficial, and on any one part of the body, one can observe lesions in different developmental stages i.e. papules, vesicles, and crusts. In addition, chickenpox rarely produces lesions on the palms and soles, which is not the case with smallpox.