It depends on the type of device used whether or not Iodine will be a problem. In the unlikely event of a device being used that produced iodine, then KI might help to mitigate that hazard, assuming you were to get exposed in the first place (which is unlikely if you are sheltering in place). Just make sure you don't have an allergy to iodine before you start popping pills. The results could be unfortunate.

Greg