A woman came back from a trip to the Uganda jungle with Marburg virus, a cousin of Ebola that's even deadlier, NBC News reported.
Now, Michelle Barnes' blood has a provided a potential cure for the infection.
Researchers at Vanderbilt University and Mapp Biopharmaceutical Inc. isolated an especially potent immune system protein called a monoclonal antibody from Barnes and have used it to cure monkeys infected not only with Marburg virus, but with a related virus called Ravn.
They are working to find ways to mass-produce the antibody and test it in people.
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The hope is to have supplies ready in case of outbreaks of viruses like Marburg and Ebola, which killed more than 11,000 people and sickened 28,000 in a 2014-2016 epidemic in West Africa.
"If somebody needed to get Marburg virus so you could donate your cells for research, I am glad it was me," Barnes said. "I happen to have really good immunity."