Originally Posted by kathymuggle
I do not suspect decreased vaccination - vaccine rates are high and stable. I do not highly suspect "pockets" of low vaccination, as there have been pockets of low vaccination forever but rates are just increasing now.
They have been steadily increasing. See this map:
"Back in 2000, only 0.77 percent of California kindergartners had personal belief exemptions from vaccines. By 2013, that percentage had more than quadrupled to 3.15 percent.
The scale on these maps tops off at 5 percent. But in some individual school districts, the actual PBE rate is much, much higher. At River Springs Charter School in Temecula, California, nearly a quarter of the 556 kindergartners had personal belief exemptions this year. A third of the kindergartners at the Visions in Education public school in Carmichael hold PBEs, as do 51 percent of kindergartners at Ocean Grove Charter School in Boulder Creek. At a handful of private schools, the PBE rate is 75 percent or more."
From another article:
"Hundreds of thousands of students attend schools — ranging from small, private academies in New York City to large public elementary schools outside Boston to Native American reservation schools in Idaho — where vaccination rates have dropped precipitously low, sometimes under 50%. California, Vermont, Rhode Island, Arizona, Minnesota, Florida, Illinois, North Carolina, Virginia and West Virginia also were included in the analysis.
The 13-state sample shows what many experts have long feared: People opposed to vaccinations tend to live near each other, leaving some schools dangerously vulnerable, while other schools are fully protected.
The clusters create hot spots that state immunization rates can mask. In the 32 public elementary schools in Boise, Idaho, for example, vaccination rates for measles in 2013-14 ranged from 84.5% at William Howard Taft Elementary to 100% at Adams Elementary, just 4 miles away.
One of the biggest reasons for low vaccination rates is the increased use of non-medical exemptions, led by states such as Arizona and California, which both had increases of nearly 70% in exemptions from 2009 to 2013. Nationally, philosophical or religious exemptions have increased 37%, according to the CDC.'