New CDC data reveals a record high of kindergarten vaccine exemptions nationwide. The exemptions reached 4.2% last school year, largely due to non-medical opt-outs. Certain states saw significant increases, with Idaho's rate exceeding 17%.

In contrast, some areas maintained low exemption rates. California had one of the lowest rates in the country, at 0.1%. An infectious disease expert from UCSF weighed in on the implications of declining national MMR coverage for herd immunity.

Further details on the vaccine exemption rates and their impact are available from the source. The CDC data provides insight into the current state of kindergarten vaccine exemptions and their effects on public health.