Smallpox is caused by the variola virus. This comes in two strains: the less severe variola minor and the more deadly variola major. It is highly infectious, and has an incubation period of between ...

The mpox virus is related to the original smallpox virus (Variola major). The EMA's decision to approve Imvanex was based on laboratory data showing that the vaccine offers cross-protection.

The Mpox virus is related to the original smallpox virus (Variola major). The EMA's decision to approve Imvanex was based on laboratory data showing that the vaccine offers cross-protection.

The Mpox virus is related to the original smallpox virus (Variola major). The EMA’s decision to approve Imvanex was based on laboratory data showing that the vaccine offers cross-protection.

Variola major has case fatality rates of 5% to 30%, depending on vaccination status. [1] Variola minor is less common, much less severe, and has a death rate of 1% or less.

The Last Cases Years of work by the World Health Organization’s Smallpox Eradication Unit isolated the deadly variola major strain of the virus to Bhola, an island off the coast of Bangladesh.

In early 1991, several scientists went deep into the Siberian tundra on a covert mission. They worked for a secret laboratory funded by the Soviet government, and they needed a sample of variola major ...

Throughout the course of human history, one infectious disease (Figure 1) may account for more deaths than any other, perhaps all others combined. Smallpox mortality falls between 20% and 50% ...

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

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 ...

In October 1975, after World Health Organization epidemiologists learned of her infection, health workers vaccinated those around her, putting an end to variola major transmission around the world.