The Obama administration is talking about ramping up the screening of travelers who come from Ebola-infected countries, amid concerns that the virus may spread. CDC staffers will likely be added at airports in New York, New Jersey, Chicago and Dulles International Airport, NBC News has learned. "We're also going to be working on protocols to do additional, faster screening both at the source and here in the United States,” President Barack Obama said Monday. The move comes as 11 percent of Americans said they were "very worried" that they, themselves, or a family member will be exposed to Ebola, and 21 percent said they are somewhat worried, according to a Pew Research Center poll. The administration does not support blocking flights from West Africa.