@georgetakei I've heard antivaxxers claim that it's actually because we don't have horses leaving waste in the streets anymore.
That's right: their justifications are literally horseshit.
Lets see how this graph changes now with the outbreaks currently happening in areas with little vaccination ... And see how that compares against today's use of horse transport.
They'd probably shift the narrative and claim that dog shit qualifies, too, or something.
And since peeps gladly believe anything that fits their agenda the onus is on you to disprove them, an effort that typically takes time and money. Time so much that when your're done nobody's interested in your results anymore. That's the trick, you know.