Should have grown some and killed it.
Let's take a look at this story.
The op released the mouse.
Said mouse found another house to live in where a small child lived called Johnny.
Mouse contaminates new house with Salmonella-Hantavirus and even Lyme Disease.
Little Johnny Is only 3 years old but is going to die soon because the mouse spread salmonella over the surface that little Johnny dropped his sweets on, his sticky little fingers wiped over the germs and as he put the sweets back into his mouth he got infected.
Later that day Johnny gets Salmonella developed diarrhoea, fever, and abdominal cramps 12 to 72 hours after infection. The illness usually lasts 4 to 7 days, and most persons recover without treatment.
In some persons the diarrhoea may be so severe that the patient needs to be hospitalised. In these patients, the Salmonella infection may spread from the intestines to the blood stream, and then to other body sites and can cause death.
Johnny was buried 5 days later, and his mother distort with pain and anguish killed herself.
Never release vermin, kill it always.