Yes, a study of small pox and its causes and cure are beneficial for skincare research. I believe that most skin care medication are based on research from other skin ailments like small pox. Small pox like most skin ailments leave scars and has inspired medical laboratories to come up with products that help in rehabilitating these scarring.
Smallpox was a highly contagious disease. That won't do any good to anyone who actually contracts smallpox,However, the smallpox vaccine (shot) is helpful. Smallpox is an extremely contagious and deadly virus for which there is no known cure. .Further outpatient care for smallpox patients includes cosmetic management of scars and corrective vision care.
Smallpox is dangerous and should not be used for skincare. It could potentially cause a new outbreak and because it is mostly irradicated and because very few people are vacinated against it, it would be a really bad idea for people to try as it could cause billions of deaths.
C'mon, now! Finding value in nature and finding natural remedies is amazing, and in the world's forests and meadows there are an untold number of miracle products waiting to happen. Do we really need to cultivate, commercialize and tout deadly diseases and plagues as amazing modern miracle cures? Let sleeping dragons lie.