[sigmaprimus]

I stand corrected, also the model does not take into account the Z axis, magnitudes of area added by highrises.

[robertlagrant]

Yes - it really should be spheres, but ones that cannot use other spheres for support :-)

[eesmith]

I think "should be" pushes things beyond the limited humor there was.

The 6 feet suggestion is based on the travel distance of possible virus-carrying particles, given people on a flat surface.

Since gravity pulls particles downward, I suspect that being 5 feet above someone sick is better than being 6 feet below. Possibly even better than being 6 feet to the side.