Final answer:
When a child is placed in an isolation room, a nurse should explain that the child needs to stay there for a while to get better without spreading germs, in a way that's reassuring and understandable for the child.
Step-by-step explanation:
When communicating with a child who has been placed in an isolation room to prevent infection, it is important to provide reassurance while being truthful about the situation. Therefore, an appropriate response a nurse might tell the child is, "You need to stay in the room for some time to make sure you get better without the germs spreading." This statement is factual, does not induce unnecessary stress, and explains the situation in terms the child can understand. It is unnecessary to overdramatize the room as magical, but rather, position it as a place where they can recover safely without the worry of making others sick.