Coughing and sneezing isn’t capable of airborne transfer. Duh.
ID 50 is 1-10 virons.
Yes, if the airborne droplets impact a mucous membrane (that includes the eyes) you can be infected. Normal range for that sort of thing is about 3 feet, but fine droplets can travel farther depending on air currents.
That also goes for the spray from vomit.