Thats good to know..I read on AOL that they would use the live form. I have also been told by a doctor and a pharmicists after reading the pharmacy information on the Dex and on the Cortef. That says to avoid having live virus vaccines for up to 1 year after being on the steroids. The pharmicists told me it would be like giving me the virus. Also what I thought I understood was that the steroids do affect our immune system, making us more suseptable to diseases...I dunno, but thanks for the info!