Scientists ask if Ebola immunizes as well as kills

January 27, 2015 8:44 AM

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LONDON/DAKAR (Reuters) - A recent sharp drop in new Ebola infections in West Africa is prompting scientists to wonder whether the virus may be silently immunizing some people at the same time as brutally killing their neighbors.

So-called "asymptomatic" Ebola cases - in which someone is exposed to the virus, develops antibodies, but doesn't get sick or suffer symptoms - are hotly disputed among scientists, with some saying their existence is little more than a pipe dream.

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