Travel restrictions are just more security theater that provide no real benefit with real costs to generate a false sense of security. The WHO and other international health organizations do not support them for Ebola because they ignore the transmission method of Ebola.

If you put in restrictions, you generate real economic hardships, increase government costs and increase public panic over the seriousness of an Ebola pandemic, while providing no real firewall against the disease. If it were aerosolized like the common cold, then it might make sense, but we didn't even do this for SARS.

http://www.washingtonpost.com/news/to-your-health/wp/2014/10/01/why-hasnt-the-u-s-closed-its-airports-to-travelers-from-ebola-ravaged-countries/