We did. Usually, we would get two to four shots at a time.
On one run through the “gauntlet”, one of the shots was very painful. I was looking at it and trying to massage it, then noticed blood dripping off the OTHER arm, from the shot that did not hurt one bit.
I was tested for immunity to German measles while in boot camp, too. As one of about three in my company of 80 who did not have immunity, I had to make a special visit to the clinic to get that shot. It was delivered through a needle, and it was painful and swelled up for the next few days. Maybe 5 or 6 years ago, I was tested again and I am immune to German measles. So that one shot almost 40 years ago did the trick.