Non-falsifiable? If anything, deaths post-vaccine are rarely attributed to the vaccine, but yes... those diseases can pose problems. I didn't think mumps was very fatal 🤔 My mom had it as pregnant at 19 & gave it to her 44-yr old dad that fared worse with, you know, testicles - yikes - but it's not much for fatalities. Rubella is mostly a concern for pregnancy, but measles does kill some chil'ens.

Wait for it... diseases are eugenic by nature & may the odds be ever in your favor 😉