So far this year, there have been 41,000 cases in Europe and 40 deaths, according to the World Health Organization. The European experience may offer a window on how quickly things can go awry when parents choose not to vaccinate their children, doctors caution
At least 95 percent of the population must have received at least two doses of measles vaccine to prevent outbreaks, WHO said. Some parts of Europe are below 70 percent
Apparently Europe has their own problems with people not getting vaccinations
https://www.nbcnews.com/news/amp/ncna922146