Cats are much younger than measles, so yeah, cars would look safe being only a little over 100 years old. However, when you fairly compare the time periods of say, the last decade, or even just the 1950s or 1960s, cars were more deadly than measles during any of those time periods. We could talk about the 12th century if you like, but we ended that century. Long time ago.
Tell ISIS. They want to take us back there, or further. Friends of theirs are the only reason polio isn't eradicated yet. Although if they're more clever than I grant they might accept a campaign against measles. Research suggests Measles hadn't evolved from Rinderpest into a form that could infect humans until a couple hundred years after the prophet. Perhaps they'd be against it as too modern a disease and treat it like HIV. Throw enough disease sufferers off roofs and you'll decrease its incidence.
I want to keep my modern technology. ALL OF IT. And keep improving it as best we can. Improved, safer, smallpox vaccines have been created since its eradication. The only component of my generations' routine childhood vaccines to have anywhere near common significant side effects was Pertussis. The DPT now has been improved to include an acellular 'P' component that removes most of that problem. Yet we have had frequent Pertussis outbreaks in our schools from lack of vaccination for it. Vaccines would probably be better yet by now had Bill not let Hillary play with the system back in the 90s. Vaccination is amongst the best studied of all medical interventions and has an enviable cost benefit ratio. Stop using 7th century, or any other century, superstition against it. History and medical logic says the old bad, non-eradicated diseases will come back if we let up. Maybe we could prevent some of the deaths with a few days of ICU care, but I'd rather be vaccinated and spend the difference on a new car. Vaccines are cheap. Vaccines are effective, as proven in part by all the anti-vax folks saying they can't remember cases of what the record clearly shows to have been common problems before the vaccine era. If G*d thinks you deserve to be Zotted with a 1/million problem He'll find a way whether or not you've had a vaccination for an excuse.