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The Affordable Care Act’s health insurance marketplaces will launch Oct. 1, but many questions remain for consumers, employers and the health care industry. Who is eligible? How can they apply for subsidies? Will comparison-shopping be as easy as buying an airline ticket or hotel room?

KHN’s Julie Appleby and Mary Agnes Carey, who wrote today’s KHN consumer guide to the marketplaces, are participating in an online discussion on the Washington Post website today, answering reader questions about how to navigate the new system. The discussion begins at noon ET, but you can submit your questions now at: