Link is http://www.leginfo.ca.gov/pub/11-12/bill/asm/ab_2101-2150/ab_2109_cfa_20120501_150815_asm_comm.html
Here is a short exerpt:
)Rationale . According to the author, this bill preserves a
parent's option to exempt their child from immunization
requirements and ensures that a decision to do so is an
informed one, based on accurate and up-to-date information
regarding individual and public health risks of not immunizing
their child. According to the author, the number of vaccine
exemptions has increased dramatically in the last decade,
leading to real concern about the loss of "herd immunity" and
potential for serious disease outbreaks, particularly in
school classrooms and communities whose exemption rates can
exceed 40%. He indicates that misinformation widely available
on the internet and sensationalist media reports have made it
more difficult for parents to receive accurate, fact-based
information about vaccines and to ascertain what information
is reliable. In addition, he indicates the bill will preserve
the right to exemption for those with deeply held beliefs,
while deterring parents who may request an exemption out of
convenience. Under current law, exemption only requires a
parent's signature and is simpler than submitting proof of
vaccination.
This bill is supported by a wide range of public health
agencies and medical associations, and is co-sponsored by the
California Medical Association, California Immunization
Coalition, American Academy of Pediatrics, and the Health
Officers Association of California.