What kind of damage does smallpox cause?

Death, disfigureing. The case fatality rate for smallpox ran ~30% in most forms up to 100% in malignant forms. Dimed sized facial "pox" often left permanent reminders of those that survived the disease. Severe fever leading to being bedridden was common in the first wk.Since there have been no cases since 1977 & those only in the third world, few doctors now in practice have ever seen a case.