Infectious disease experts from World Health Organization (WHO) and the CDC state that the Ebola virus is not airborne, making transmission through casual contact in a public setting extremely unlikely. A person exposed to Ebola is only contagious when symptoms are present – severe fever, body aches, headache, weakness, diarrhea, vomiting. Since Dr. Jamison had no symptoms and had no contact with Nancy or Dr. Brantly after they were contagious, we were confident it was safe for him to travel back to the USA.
Ebola can only be transmitted to others by coming into contact with blood or bodily fluids. Patients are at the most dangerous when Ebola is in its terminal stages, inducing both internal and external bleeding, and profuse vomiting and diarrhea - all of which contain high concentrations of infectious virus. Anyone at this stage of the illness is close to death, and probably also too ill to travel, according to Bruce Hirsch, an infectious diseases expert at North Shore University Hospital in the United States. Again, Dr. Jamison manifested no symptoms and continues to be healthy.