According to MIT Researcher, Lydia Bourubia, coughs and sneezes can cause gaseous clouds that travel up to 27 feet, meaning the 6ft. apart rule won't really matter.
As of right now it's recommended that you stay six feet away from an infected person with Coronavirus based on large droplets than can only travel a short distance. She states that "peak exhalation speeds can reach 33 to 100 feet per second and current surgical masks and N95 masks aren’t tested for those potential characteristics of respiratory emissions."
These gaseous clouds can carry various sizes of droplets, not just large ones. Droplets can travel up to 27 feet and still be infectious.
If you are going out in public, are you remaining 6 ft. apart?