Background. Smallpox is an acute, contagious disease caused by the variola virus, a member of the genus Orthopoxvirus, in the Poxviridae family (see the image below).Virologists have speculated that it evolved from an African rodent poxvirus 10 millennia ago.ackground. Smallpox is an acute, contagious disease caused by the variola virus, a member of the genus Orthopoxvirus, in the Poxviridae family (see the image below).
Most of the time in Western Australia and the Middle East. There is pure talc in the European Alps and the Himalayas. 4 people found this useful. Edit. Share to: 1  The Five Major Parts of the Brain At its most basic, the brain controls the body. 2  Electrical impulses are sent along the nervous system to and from the brain that regulate all movement.
talc Talc is the softest mineral; it can be easily scratched with you fingernail. It may have a pearly luster. Talc is often described as having a greasy or soapy feel to it. Talc is commonly white, but can also be a pale green or pale pink. You might get talc and gypsum confused because they can have similar appearances. 12. gypsum Gypsum is a soft, light-colored mineral. Its color can be colorless and transparent (selenite) or white, pale pink or pale brown. If crystallized, it displays one direction of excellent cleavage, but the cleavage fragments are much thicker than those of mica and the fragments are not elastic. Generally, it lacks the greasy feel of talc.