To discuss any illness, it is important to define it first. While some viruses appear and leave soon, others stay for a while, causing too many troubles. So-called variola virus belongs to the second category. It results into the disease called smallpox. It is easy to detect the disease visually as the pus appears on the body’s surface. It looks like the ugly lumps filled with the white liquid. These blisters expand during the course of illness.

Symptoms and signs of the smallpox are also obvious. Not only visual symptoms appear. At the early stage, an immediate signs that also can be associated with the cold, fever, or flu show up. The person starts feeling general discomfort. He or she complains of heavy head, exhaustion, back ache, nausea. People infected with this virus may often demonstrate a desire to vomit.