The total number of American healthcare workers flown back to United States has reach 16 according to Fox News. Many news outlets believe that the fight against Ebola is far from over. The nidus for the new wave of "potential exposures" comes from an unnamed worker in Sierra Leone. The unnamed worker tested positive for Ebola and is currently being treated at the National Institutes Of Health located in Bethesda Maryland. It should be noted that the other 15 Americans, which has contact with the unnamed America, have not tested positive according to the CDC. The CDC guidelines define "high risk" as someone who has known exposure to the virus. For example, a healthcare worker that worked closely to or cared for someone with Ebola, or someone with a needle stick from an infected patient.
If that patient has no symptoms indicating an Ebola infection, the CDC recommends daily monitoring by a health official for 21 days and restrictions that prohibit travel by airplane, ship, or long-distance bus or train.