100 People in Dallas Area Monitored for Ebola Symptoms

The transcript discusses the Ebola case of Thomas Eric Duncan, who traveled from Liberia to the US. After showing symptoms, he was diagnosed with Ebola. His family was quarantined until October 19th to prevent the disease's spread. Despite concerns, the CDC stated Duncan was not contagious during his travels as he showed no symptoms at that time.

How many airports and continents were involved in Eric Duncan's journey back to the US?

What did the CDC state about Eric Duncan's contagiousness while traveling?