Smallpox (also known by the Latin names Variola or Variola vera) is a highly contagious disease unique to humans.
It is caused by two virus variants called Variola major and Variola minor.
major is the more deadly form, with a typical mortality of 20-40 percent of those infected.
For more information about the topic Smallpox, read the full article at Wikipedia.org, or see the following related articles:
Editor's Note: This article is not intended to provide medical advice, diagnosis or treatment.
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