Bacteria are worrying with their exponential reproduction, but viruses are what worry me. Radically smaller, not alive (so there isn't anything to kill), just

Bacteria are worrying with their exponential reproduction, but viruses are what worry me. Radically smaller, not alive (so there isn't anything to kill), just a little jumble of parts that if they happen to get bumped into one of your cells, hey, it hijacks everything and forces the cell to create copies of the little jumble of parts until it explodes.