Second go at the illustration. Hopefully it looks better and also remedies a crucial but blink-and-miss error in its representation.
For something to be contagious, one always needs an excellent mode of transfer from the source to the destination.

Contagious
Contagious
Contagious
For something to be contagious, one always needs an excellent mode of transfer from the source to the destination.
(This is an illustration done for this week’s Illustration Friday theme, Contagious.)

