I've been meaning to mention that the 6 foot rule is fairly arbitrary. I said it once earlier, but didn't follow up on it. It's not like the viral droplets have a maximum range of 6 feet.
A Chinese study in a Wuhan hospital found aerosol droplets with the virus as far as 13 feet away (downstream, and 8 feet upstream). There's debate about how infectious or dangerous such tiny droplets are. But no one wants to get them in their respiratory system to find out.
Also in a food store or other place where people move around, someone could cough, walk away, and then you walk right into their viral spray, while always being more than 6' from that or any other person.
Which are two good reasons masks are an essential supplement to social distancing. Viral spray can exceed 6 feet, it's hard to maintain 6 feet of space in many places, and while people move around, a viral spray form a cough or whatever can hover in place or drift more than 6' on air currents.
When in public, masks + distance = the best strategy. Plus not touching your face and washing hands when you get home/a chance to do so.
I don't know why none of our health care pros or public spokespeople can't simply say this. I still see articles in major media that leave off masks as a recommended precaution.