My upper left arm scar wasn't made by TB vaccine though, it was Rubella vaccine. I didn't associate it with aftereffects of the vaccine itself, it was the unique method of delivery - an airgun instead of a needle. Never seen that before or since.
They made a big deal of it, our entire elementary school got it at the same time. And they specifically said it was for German Measles, I don't think MMR had been invented yet. This would have been before 1970.
[https://www.health.nsw.gov.au/Infectious/tuberculosis/Pages/...]