We also have to look at the data we have so far. If all of sudden they find many on the subway were infected then by all means I will jump on the bandwagon. Right now the data shows the risk is slim to none.
There is another piece of data to look at, and that is the mortality rate and horrific torture of Ebola.
Flu might be 70% easier to catch, but the mortality rate of the Flu (esp. in healthy adults) is somewhere around 0.00000001%. The mortality rate of Ebola is at around 70% in Africa. (there isn't enough data for the U.S. mortality rate, but as of now it's at around 1/7)
The Flu may keep you in bed for a week with a bad cough and a fever, Ebola can make one bleed from their ears, nose, eyes and anus.
So, if I sit down in a NYC subway train (which is already full of all kinds of germs), and ten people in my train car have the flu, and they are coughing and sneezing without covering their mouths, I'm still not worried even though there may be a 50% chance of catching the flu, because even if I caught it, at worst I would be out of work for 3-4 days. If one man sat down in a train car that has or may have Ebola, even if there is a 1% chance that I can catch it, I would be terrified, because I may end up G-D forbid dead.
This brings to mind one of Jackie Mason's classic jokes:
(don't remember the exact words)
"People say that you shouldn't be afraid to fly on a plane, because statistically, you are far more likely to get into a car accident than a plane accident.
Let me ask you something: when was the last time you bumped into someone you know, and they said "oy! my back is killing me, my plane crashed right into a mountain!"