How is it possible for animals to produce things like venoms and poisons without being harmed?
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Some toxins do not activate unless they see distinctly human chemicals. All of our cells have sugars and proteins on the outside, different sugars/proteins indicate different types of cells. If the toxin attaches to a sugar it knows is found in human lungs, it will turn on. Otherwise it just floats around harmlessly.
It’s like a gun with a safety on, or taser with no batteries, until it connects to the right cell. This is one method of toxin activation, but there are others as well.
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