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 ...

Vaccination has become a much talked about topic since the COVID-19 pandemic and one Facebook post is singing its praises. "Smallpox killed more than 300 million people in the 20th century alone," ...

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 ...