Yes, Jeanne, I mean BABY calves, not 2-3 month olds.
Granted, there have been millions of green Cheerios applied with no problems, but I've seen a number of tetanus cases in calves banded shortly after birth.
Vaccinating the dam with a tetanus toxoid-containing bacterin/toxoid would, theoretically, pass along anti-tetanus antibodies in colostrum; if she'd been properly vaccinated as a calf, you could just booster every year or three, 8 weeks or more prior to calving, in order to stimulate a good level of colostral antibodies against tetanus. If not vaccinated as a calf, she'd need the appropriate two doses, with the last one at least 8 wks pre-calving.
Or, you could give a dose of tetanus antitoxin to the calf at the time of band application
Unless you just want to 'roll the dice'.