People infected with Ebola vary greatly in how severe their symptoms are. Now, a new study in mice suggests that genetics plays a role in how each body reacts to the same Ebola virus. To study the relationship between genes and the virus, researchers used a group of mice that were bred to have high genetic diversity, as opposed to the typical laboratory mice, which are produced by many generations of inbreeding and are therefore extremely similar. Normally, classic lab mice don't develop the symptoms of Ebola that are seen in people, even though the animals do die from a lethal dose of the virus.
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