Everyone has a personal microbial cloud

[elte]

The body emits a microbial plume.

http://www.npr.org/sections/health-shots...es-follows

[C C]

With some studies contending that the body's microbiota outnumber its human cells by ten to one, I suppose it was inevitable that we also have our own fuzzy "coma", and maybe even a tail when the breeze is at least mildly strong.

Warmed comets, however, probably rarely get close enough to exchange "aura" material so as to acquire pseudo-kinship (barring periods of Oort cloud disturbances back in the early days of the solar system when the inner planets were getting catastrophically bombarded by thick waves of them).