Here's a look at smallpox, a contagious and sometimes fatal infectious disease. The most severe and most common form of the smallpox virus is known as variola major. Smallpox is transmitted through ...

The premise: Dr. Jacob Hood (Rufus Sewell) is a biophysicist and a science advisor to the U.S. government who investigates crises. An old friend, Dr. Calvert Rigdon (Oded Fehr), virologist and ...

A child mummy from the 17th century, found in a crypt underneath a Lithuanian church, was discovered to harbor the oldest known sample of the variola virus that causes smallpox. Researchers who ...

Rahima Banu, a toddler in rural Bangladesh, was the last person in the world known to contract variola major, the deadly form of smallpox, through natural infection. In October 1975, after World ...

Viruses form a distinct group of infectious agents that are fundamentally different from bacteria and protozoa. The infectious particle, called the virion, requires the machinery of a host's living ...

Smallpox, which is caused by the variola virus of the Poxviridae family and the orthopoxvirus genus, is among the most devastating human diseases. It may have originated and spread from Egypt, the ...

Here's some background information about smallpox, a contagious and sometimes fatal infectious disease. The most severe and most common form of smallpox is known as variola major, which has four ...