Enrollment counselor Vue Yang (left) reviews health insurance options for Laura San Nicolas (center), accompanied by her daughter, Geena, 17, at Sacramento Covered in Sacramento, Calif., in February.
Peter Lee, executive director of Covered California, (left) poses with his uncle, Philip Lee, and father Peter Lee (seated) at the younger Peter Lee's home in Pasadena, Calif., in 2013.
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A Yale University study analyzed the experience of 60 million Americans covered by traditional Medicare between 1999 and 2013, and found "jaw-dropping improvements in almost every area," the lead author says.
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