Has horsepox become extinct?
Mystery surrounds the extent to which horsepox virus may have contributed to the vaccinia virus used to eradicate smallpox. With few documented cases of horsepox in recent years it may never be solved, says José Esparza, who seeks to raise awareness of the potential historical and  scientific importance of identifying new cases.
Senior Advisor, Global Health (Vaccines), Bill & Melinda Gates Foundation, Seattle, Washington, USA.
José
J
Esparza
D000818:Animals; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D049674:History, 21st Century; D006734:Horse Diseases / Q000453:epidemiology* / Q000517:prevention & control; D006736:Horses; D012899:Smallpox / Q000453:epidemiology / Q000517:prevention & control / Q000662:veterinary*; D012900:Smallpox Vaccine / Q000266:history; D014611:Vaccination / Q000266:history / Q000662:veterinary*; D014616:Vaccinia virus / Q000276:immunology; D012901:Variola virus / Q000276:immunology*
D012900:Smallpox Vaccine