What does "worked" mean? Illness and risk lower, or simply people following orders? People have lost sight of the former after unrelenting emphasis on the latter.
It's time to turn critical thinking skills back on.
There were 1282 cases of measles in 2019. Around 90% were caused by anti-vaxx hermit communities who freeload off the protections of the police, military, healthcare system, and other services, but live here and put others at risk because magical beliefs makes them "special". If you reject vaccinations, then I suggest you should sign a waiver that you also reject healthcare. Can't have it both ways. "Ounce of prevention."
It's time to turn critical thinking skills back on.