President Donald Trump Credit: ShutterstockPediatricians in Florida are pushing back on President Donald Trump’s executive order calling for changes to the childhood vaccination schedule. So there’s a reason for such epidemic rates of autism,” Trump said. Herd immunity for measles requires a 95 percent vaccination rate, according to the World Health Organization, yet the average vaccination rate for Florida’s kindergartners this year is 88.9 percent, according to DOH data. Sarasota County has the lowest vaccination rate with 82.1 percent, while Calhoun County has the highest rate with 98.7 percent. The closest Florida got to a 95 percent vaccination rate was in 2017, when the average was 94.1 percent.