I’ve had 3 kids all of whom have had the MMR. As you are aware MMR is a live virus vaccine and recipients shed those virii for a while after they are innoculated.
Not dead yet.
Oh yeah. I grew up in a 3rd world country. In a very overcrowded city in a tropical 3rd world country in Africa. I should have run across the rubella virus at least once hypothetically there. That country has only recently begun to vax against that. I went to pre-school, church and socialized with the natives of that particular country.
I did manage to catch malaria while I was there. I remember that. It wasn’t pleasant. Still alive though.