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Hemorrhagic Fevers Can Be Caused by Body’s Antiviral Interferon Response

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Hemorrhagic fevers caused by Lassa, dengue and other viruses affect more than one million people annually and are often fatal, yet scientists have never understood why only some virus-infected people come down with the disease and others do not.

But now, virologists and immunologists at The Scripps Research Institute (TSRI) have found a major clue to the mystery of “hemorrhagic fever” syndromes. In findings reported this week in an Early Edition of the Proceedings of the National Academy of Sciences, the team showed that Interferon Type I (IFN-I) immune proteins are key drivers of a viral syndrome in mice that closely mimics these human hemorrhagic fevers.

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