TheEbolavirus.No-oneknowsexactlywhereitcomesfrombutonethingiscertain-it'soneofthemostvirulentinfectionsknowntoscience.ThisspecialepisodeofHorizonmeetsthescientistsanddoctorsfromallaroundtheworldlookingforthecureandhearsfirst-handaccountsofwhatit'sactuallyliketocatch-andsurvive-thisterribledisease.
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