The floating mountains of Pandora are one of features of The World of Avatar, opening May 27 at Disneyâs Animal Kingdom. On the Naâvi River Journey, guests will ride in canoes on a sacred river through a bioluminescent rainforest ending with an encounter with a Naâvi shaman.
1 Types: Variola major, or smallpox, has a death rate of 30%. 2  Variola minor, or alastrim, is a milder form of the virus with a death rate of 1%. 3  Four types of variola exist: classic, hemorrhagic, malignant, and modified.
Smallpox is a disfiguring and potentially deadly infectious disease caused by the Variola major virus. Before smallpox was eradicated, there were two forms of the disease worldwide: Variola major, the deadly disease, and Variola minor, a much milder form.