SACRAMENTO — A newspaper reports the Medical Board of California is investigating at least four physicians, including two from Santa Rosa, for issuing questionable medical exemptions to children whose parents did not want them immunized.

The Sacramento Bee on Tuesday cites documents that show investigators have sought records involving two Sacramento-area pediatricians and two doctors in Santa Rosa.

The newspaper says at least one complaint expressed concern that doctors are making "easy money" on exemptions that are not based on medical need.

A spokesman for the medical board declined to comment on the cases.

The investigations are unfolding amid the nation's worst measles outbreak in a quarter-century.

California lawmakers are considering legislation to tighten the requirements for exempting children from the vaccinations required to attend schools and day care centers.

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Information from: The Sacramento Bee, http://www.sacbee.com