The real danger can be to the person taking yhe radiation. Chemo & radiation can break your immune system down & cause you to catch anything. If either you or your daughter has had anykind of sickness in the past 2 weeks I would not go see the person. There is also some specific kinds of radiation that can be harmful to the people around you. You can ask them what kind and if their Dr. Give them anykind of precautions. Hope your person gets well.