Students Amanda McComas, Rose Marie Chute and Sari Schwartz are approached in October at Santa Monica City College in California about signing up for insurance with the Affordable Care Act. Robyn Beck/AFP/Getty Images hide caption

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"I apologize," Health and Human Services Secretary Kathleen Sebelius said Wednesday at a congressional hearing on problems with HealthCare.gov. J. Scott Applewhite/AP hide caption

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Rep. Mike Rogers, R-Mich., asks about website security questions Wednesday at a House Energy and Commerce Committee hearing on problems with HealthCare.gov. Chip Somodevilla/Getty Images hide caption

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One person who got a letter canceling his health insurance was Rep. Cory Gardner, R-Colo. He holds up the letter during a congressional hearing Wednesday on insurance problems. He says his family chose to buy private insurance rather than use the congressional plan. J. Scott Applewhite/AP hide caption

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He's not checking your blood glucose levels. He's playing Words with Friends. Anna Zielinska/iStockphoto.com hide caption

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Many people who buy their own health insurance are being told their policieswill be canceled. New coverage may cost more and sometimes less, but it can't be denied because or pre-existing conditions. iStockphoto.com hide caption

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Scans from patients with fungal meningitis show evidence of a stroke (left) and arachnoiditis. New England Journal of Medicine hide caption

itoggle caption New England Journal of Medicine

Marilyn Tavenner was the first Obama administration official to testify before Congress about the troubled launch of HealthCare.gov. Chip Somodevilla/Getty Images hide caption

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