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Fourth-grader Arylu Paniagua, 9, receives an immunization shot from registered nurse Patricia McGleam in the Loyola Pediatric Mobile Health Unit, parked outside Columbus West Elementary School, February 22, 2005 in Cicero, Illinois.

More than a million California children who lack health insurance will qualify for coverage under the Affordable Care Act. When so-called "Obamacare" takes effect in 2014, more children from poor families will qualify for Medi-Cal,

Others will get subsidies for private, low-cost insurance through a new state exchange. But as Elaine Korry reports, childrens' advocates are concerned some kids won't get the best coverage.