The disease Smallpox is categorized as highly dangerous and harmful infectious virus that in occasions can provoke the death. The smallpox is also known as Variola virus. The prevention of contagious is the most effective treatment because it has no specific treatment except the vaccine. The name Variola comes from the Latin word for "spotted" referring to the raised bumps in the face and the body seen in the infected persons.
Variola major is the most dangerous of the smallpox forms.
Variola minor is the less common representation of this infectious disease. Usually represents only the one percent of the smallpox cases in the world, and the consequences are much less severe than its counterpart the Variola major.
Although the smallpox was eradicated from world human populations several years ago, the US government is preoccupied because this virus can be used by the bioterrorism against civilization and by this reason; there have been taken new precautions to prevent that occurs this scenario inside the USA or in other part of the world.
The unique natural host of smallpox are the humans and it passes form one to the other person generally through an extended face-to-face contact or through bodily fluids or contaminated objects. The aerial transmission is not common with smallpox though there are cases that confirmed this. The only treatment is the prevention, but a vaccine would no be recommended to all persons by the only purpose of a general prevention campaign against a possible risk of infection.
Summary: Smallpox is an eradicated virus that could be dangerous again with the terrorism and bioterrorism. Although there is several vaccines is not recommended to vaccine infants and children because its unknown results in them.