Give it a look and a sniff. If you don't notice anything unusual, you are good to go.

Hantavirus is rare but serious, and sometimes fatal. You can also get bacterial infections from mouse droppings.

I'd personally toss it, but it needs to be disinfected inside and out if you keep it (using gloves, and disinfected, not just washed) and not used for food or anything related to children. But really, throw it away, it's got mouse pee on it.