These are vile spores
that circulate earths atmosphere, infecting anyone by means of entering the body through the optic cavity. The spores are highly dispised throughout soceity, and you are deemed a social outcast if you succumb to their evil sporen rays.
The term for an infected person is either a 'Neo', a 'Neosporac', or a 'Prat'.
The spores themselves can only infect humans, due to their crummy immune system. Other, more complex and intelligent creatures (such as pigeons, emus and fat people) cannot be infected by neo-spores. (This is also because most obese people have a built up blockage of lard near their optic cavities, where neosporin bacome lodged and harmless. However, these will gradually form a bright green fur over the persons eyes, making them look even more hilarious than they already do.
Neosporin actually does no harm whatsoever to humans. It is merely an excuse to expel more people from modern society. It is also common practice to have Neo-sporacs burnt at the stake, as people are scared the evil spores will continue to spread forth and pointlessly infect more people.
Neosporin is like sticks; tons about, no-one cares.