Ebola virus spreads when the bodily fluids of an infected person comes into contact with the mucous membranes of a non-infected person. That means Ebola virus in fluids like blood, sweat or urine has to come in contact with your eyes, mouth, nostrils, ears, genital area or an open wound in order to infect you.
In other words, it takes a lot of contact to become infected with the virus, which is why many of the victims of the disease in West Africa are health care workers or family members caring for a sick relative. In Western hospitals, transmission is easily prevented with precautionary measures like face masks, gloves, protective gowns and isolation units.
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