While reading, I came across several references to “in vitro” and “in vivo.” These are always used in reference to testing. Here is what I found:
in vitro: performed or taking place in a test tube, culture dish, or elsewhere outside a living organism.
in vivo: performed or taking place in a living organism.
So, when referring to testing, either the tests were done in a culture dish OR in a living organism such as a mouse.
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