They did for the Polio shot 70 years ago...
They had to have parent’s consent. I had a polio shot, TB shot and smallpox. They were real vaccines, proven, tried and true. One shot, no boosters, and I don’t remember any bad after effects anyone had. Not the same as the phoney baloney crap their pushing today. Flu shots included. No one can tell me they know how a flu strain will mutate a year after they make the so called vaccine.
IIRC it wasn't a shot, it was a teeny cup with pink liquid and each student was given a teeny cup to drink, it averaged out to just a sip.