OK, I'm about to order vaccines. I had thought maybe I'd do Tetanus only vaccine this year as I really hate those bumps mine seem to get under their arm from the CDT. Looking at it, the tetanus only is a LOT more money then CDT. Am I likely not to get the bump under the arm with tetanus only, or is it something I'm doing wrong? I never get those with Bo-Se or anti biotics, but most of them get it with CDT. If I won't get the bump, it's worth paying the extra money, if i'll get the bump anyways, I'll stick with the cDT. Any ideas? What do y'all do?