The reason it spreads so quickly in third world countries is poor sanitation. As long as we use good sanitation, as well as the access we have to medical care, we should be fine.
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When an infection does occur in humans, the virus can be spread in several ways to others. Ebola is spread through direct contact (through broken skin or mucous membranes) with
blood or body fluids (including but not limited to urine, saliva, feces, vomit, and semen) of a person who is sick with Ebola
objects (like needles and syringes) that have been contaminated with the virus
infected animals
Ebola is not spread through the air or by water, or in general, food. However, in Africa, Ebola may be spread as a result of handling bushmeat (wild animals hunted for food) and contact with infected bats.