CDC spokespeople been saying that ebola isn’t contagious until the victim starts showing symptoms of the illness. I wouldn’t want to put that to the test but it’s what the medical types are saying.
Duncan landed in Dallas on Sept20th. He first felt ill on the 24th. So if what the CDC medics are telling us is accurate the people on the plane should be okay.
Feeling ill from a virus most often but not always coincides with that virus reproducing. It becomes contagious at that point because the newly increased viral load is “shedding” in mucous, saliva and/or sweat, meaning the virus is present in those bodily fluids and therefore can infect other people. Before that point, the typical aches and fever are not present. That’s the immune response once the immune system recognizes that the virus is an infection to be fought off. Aches and pains are due to new white blood cells, etc. being produced, as well as an inflammation response. The immune reaction causes the symptoms rather than the virus itself.