text: You can actually contaminate others with the radiation. However the risk is small and it depends on how much radiation therapy you recieved as well. \n\nRadio Active Iodine (RAI) is passed out of the body through all bodily fluids such as stool, urine, saliva and sweat therefore these are all potential forms of contamination. \n\nRadiation exposure is directly related to the amount of time you spend with another person as well as how intimate and close your contact is with them. Avoid prolonged, intimate physical contact with babies, children and pregnant women. \n\nFor a pretty easy site to follow, try http://cpmcnet.columbia.edu/dept/thyroid/raiprep.html\n\nGood luck with your treatment and get well soon!