Bacteria are alive. They move, they breathe, they eat, they react to external stimulus. They have a complex chemical metabolism.
This means that you can kill them, usually by poisoning them with something that they can’t tolerate but you can.
A virus isn’t alive – it’s more like a biochemical landmine. It doesn’t eat or breathe or react to things, it just waits to run into one of your cells. Then it “activates” and hijacks the cell to clone itself.
That’s their only function, and it makes them difficult to “kill” because they were never alive. You can’t chemically destroy them very easily because your own cells are made of the same materials.
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