Testing medication intake in space compared to on Earth, or the progression of diseases in space are a couple of examples that I can think of where having anima

Testing medication intake in space compared to on Earth, or the progression of diseases in space are a couple of examples that I can think of where having animals at ISS over longer periods of time could help tons of lives down the line. It's not a certainty, of course, but then again neither was any of the research done until now.