Marjorie Taylor Greene, a prominent Republican congresswoman and a staunch ally of Trump, suggested a return to “measles parties” for children. She criticized contemporary attitudes towards vaccination, stating, “Now, they demonize parents who refuse to vaccinate their kids.”
My explanation is simpler: “The body learns how to fight diseases by eating killed viruses. A vaccine gives you dead viruses, so your body can learn without having to get hurt first. A measles party uses living viruses, so your kid might suffer death or worse.”
Then show them the results.
Probably not accurate in detail, but hopefully good enough. If not, then the brevity will let you move onto someone who hasn’t abandoned their brain.
They see that rash as not that scary, and the rash is honestly the mildest part of the disease. Measles can cause encephalitis (brain swelling) and kill the child, it can cause pneumonia and kill the child, they can recover from the illness and be completely fine for a few years until the virus reactivates and their entire central nervous system becomes intractably inflamed and they seize until they die. And there’s nothing we can do about any of those complications besides things like IV fluids or ventilatory support because there are no antiviral medications effective against measles, so we just have to hope the child’s immune system wins.