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 ...

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

(CNN) — 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 ...