It is extremely unlikely that you will be in contact with anyone with Ebola when visiting the US. There have only been few cases reported since the outbreak occured. The US is still very much a safe place to visit.
Areas to Avoid: The CDC urges people to avoid non-essential travel to Guinea, Liberia, and Sierra Leone because of unprecedented outbreak of Ebola. Outbreaks have also been reported in Ghana and Nigeria. All of which are outside of the US.
However, in the unlikely circustance that you were to contract Ebola, you would be covered up to your policy maximum as long as you did not visit any of the locations where there are serious outbreaks.
You may want to refer to: Information about Ebola for International Travelers
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