What to know 

Caption:UNDATED: In this handout from the Center for Disease Control (CDC), a colorized transmission electron micrograph (TEM) of a Ebola virus virion is seen. As the Ebola virus continues to spread across parts of Africa, a second doctor infected with the disease has arrived in the U.S. for treatment. (Photo by Center for Disease Control (CDC) via Getty Images)

How the Ebola virus spreads

Michael Martinez and Jacque Wilson, CNN
Yes, Ebola is a scary infectious disease. But the first thing you should know is that it's not very contagious.

Countries with travel restrictions in place

Nick Thompson and Inez Torre, CNN
The worst-ever outbreak of the Ebola virus is stretching the medical capacities of Guinea, Liberia and Sierra Leone -- the three West African countries hit worst by the virus -- and alarming leaders around the world.
Family father Etienne Ouamouno holds a picture of his second wife Sia Dembadouno and their son Emile in his hands as he sits in front of their family house in the village of Meliandou, Guinea, 16 October 2014. 31-year old Etienne is the father one-year old Emile Ouamouno who is reportedly the first victim of the ebola virus, registered on 28 December 2013. The family has suffered five losses in the recent outbreak of the ebola virus. Meliandou is the village from where the current ebola outbreak first took its course. Village residents have not only lost many of their relatives but also their hopes. Photo by: Kristin Palitza/Picture-Alliance/DPA/AP

Who is patient zero?

Holly Yan and Esprit Smith, CNN
Before the virus ravaged West Africa, before the deaths soared into the thousands, before the outbreak triggered global fears, Ebola struck a toddler named Emile Ouamouno.
orig dr sanjay gupta answers your questions about ebola npr_00011118.jpg

Can you catch Ebola on a plane?

Katia Hetter and Jacque Wilson, CNN
You're settling into your tiny coach seat on your next business trip, and the person next to you starts coughing. Should you be alarmed?
Bentley, the dog of nurse Nina Pham, has been cleared of Ebola.

Can pets get or spread Ebola?

By Holly Yan, CNN
A nurse's aide in Spain catches Ebola; her dog is taken away and put to death. Can pets really spread the disease?

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