Someone had posted a link, and I can't seem to find it about the differences between core vaccines and yearly vaccines. I would like to start compiling some information about this to pass on to clients for our kitten packages. We are getting clients who have lost cats to, or have freinds or family who have lost cats to vaccine related sarcoma's and don't want to do any vaccines at all. I just want to gather information for them so they can at least be informed about their descision.