Why do some Ebola survivors contract the virus again?

Name: Why do some Ebola survivors contract the virus again?
Uploaded: 2015-10-09T16:32:14.000Z
Duration: 50 s
Description: BBC News looks at how it is possible for Ebola survivors to contract the virus again.

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BBC News looks at why some Ebola survivors suffer a flare up of symptoms after recovering from the virus.

Health

9 October 2015