Smallpox can infect the human body by inhaling the variola virus. The symptoms of smallpox needs about one to two weeks to start showing up. The first noticeable symptoms are similar to flue. Smallpox has a unique symptom which is a growth of pimples that leaves marks on the skin.
Variolation is one of the early methods that aimed to manage the disease. Dried tissues from infected patients were consciously used to infect