Everyone should have a mask or kerchief (like the bad guys in the old cowboy movies) or even use his or her hand to limit or block airflow from the lungs. Use of hands could be very effective, but we have to remember to do it and not touch our face. 6ft social distances are almost always violated with about 3 ft at supermarket checkouts.
If everyone did something above, the spreading rate would crash. Of course, hands must be washed often especially after touching something public like door handles and ATM pads. Keep hands off face.
If anyone knows how I can remove that image to the right. Please lt me know.