We would probably see some effect on the mice even if it was not a strong one. When we say that something worked on mice but not humans, it usually means that t

We would probably see some effect on the mice even if it was not a strong one. When we say that something worked on mice but not humans, it usually means that the effect on humans was insufficient to be worthwhile, but we can see it. It may be worthwhile exploring further. If we saw even a small effect in mice, it might suggest an area to do further research.