FACTBOX - What is Ebola?

Dec 6 (Reuters) - A new strain of the deadly Ebola virus is thought to have infected 93 people and killed at least 22 in Uganda, including a doctor and three other medical staff looking after patients, a health official said on Thursday.

The last time Uganda was hit by an epidemic of Ebola -- a disease in which those infected often bleed to death -- 425 people caught it in 2000. Just over half of them died.

Here are some key facts on Ebola:

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