If that mouse is a Deermouse, be very careful when handling. They are a carrier of Hantivirius, which can be deadly in humans.
If it is a common field mouse, so far as I know, they do not carry that disease.
Deer mice are usually grey on top and white underbelly, where as the common field mouse is brownish.
When handling deer mice, one must or should be wearing rubber gloves and a face mask, as cleaning up the droppings there is dust, and that is where the hantivirus is mosy deadly.
Had a farmer neighbour spend many months in the hospital with hantivirus, and he was very ill. There was a time they didn't know if he would live.
Be very careful