• Variola virus
  Variola virus

  A species of ORTHOPOXVIRUS causing infections in humans. No infections have been reported since 1977 and the virus is now believed to be virtually extinct....<br/>Year introduced: 1994
  MeSH
• Ectromelia virus
  Ectromelia virus

  A species of ORTHOPOXVIRUS infecting mice and causing a disease that involves internal organs and produces characteristic skin lesions.<br/>Year introduced: 1966
  MeSH
• Abnormality of head or neck
  Abnormality of head or neck
  MedGen

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