AardvarkGoodSwimmer wrote:
And I think they sometimes recommend just getting one vaccine at a time,
whereas MMR is three vaccines in a single shot.
This is rather off topic, but your post reminds me of what someone once told me of his time in the army. He was a medic at a military base in West Germany in the 1970s. One of their soldiers hated getting shots and successfully avoided getting any of their required inoculations for a long time.
One day the GI had to go to the base hospital for something quite minor. While he was there, one of the medics looked at his records and saw how many inoculations he had missed and so they grabbed him and gave them every one of them in the course of a couple of minutes.
The former medic said that the GI was sick for several days from all of the inoculations.