You don’t get AIDs by touching somebody who has it unless you come in direct contact with their blood.
You don’t get AIDs by coming into contact with surface moisture on an armrest left by someone else that is infected with it.
You can with Ebola.
There are risky behaviors that if you don’t do, you are very unlikely to get AIDs. Touching a doorknob after someone with Ebola touches it is practically impossible to protect yourself from.
And there lies the difference. They are not the same. And you know that.
No you can't. Not unless you have broken skin at the point of contact and the "moisture" is very recent. Ebola virus isn't very robust and a few minutes away from a host kills it.
Think about this...
Somebody who has Ebola sneezes into their hands. Reaches into pocket for money, hands money to cashier at McDonalds. The chain of transfer could be a long ways down the road.
But not to worry, Obola has everything under control.