I asked my Dad to recollect about vaccinations. He remembered the days when Cholera and Erysipelas were devastating to swine, nearly 70 years ago.
When the vaccines were developed, Dad’s family built catch pens out in the pasture and herded the pigs into the pens and then proceeded to catch and vaccinate every pig.
It was a lot of work, but worth it, as it eliminated death loss from these dreaded diseases.
Curiousfarmer 
Vaccines have been one of the greatest achievements of medical science, and have save countless lives.
No argument from me, Heather.
I wish this example could get to the right people, instead of the crazy stuff going around. Wise farmers rule!