Is 6 feet enough for social separation?

It depends according to this 4/17/20 Science News report. Perhaps we need 6 degrees of separation?

"In the case of a sneeze, droplets can travel up to eight meters (23 to 27 feet), Bourouiba reports March 26 in JAMA. [...] Coughs also can propel aerosol droplets beyond six feet, evidence suggests.[...] Aerosol droplets containing infectious SARS-CoV-2 particles can hang around in the air for hours, a March 17 study in the New England Journal of Medicine found."

As to catching it from an object:

"Researchers think indirect contact is the main way people catch viruses, says Qingyan Chen, a mechanical engineer studying how infectious diseases spread at Purdue University in West Lafayette, Ind. Indirect contact might involve an infected person using their hand to cover a cough or a sneeze, then touching a cup or another object. If an uninfected person handles the object, the virus could transfer to that person’s hands. An unwitting nose scratch, eye rub or finger food snack could then infect that person. That’s why handwashing is so important."