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Guinea ring vaccination trial extended to Sierra Leone to vaccinate contacts of new Ebola case

Detection of a new case of Ebola virus disease in Kambia, Sierra Leone, after the country had marked almost 3 weeks of zero cases has set in motion the first “ring vaccination” use of the experimental Ebola vaccine in Sierra Leone. The source of Ebola virus transmission is being investigated and all the people who may have been in contact with the infected person are being traced.