An estimated 28.5 million U.S. residents, or 8.8%, lacked health insurance when surveyed in the first six months of 2018, according to preliminary data released yesterday by the Centers for Disease Control and Prevention. That’s about the same as in 2017, but down from 48.6 million in first six months of 2010, the authors said. The uninsured rate for adults under age 65 was 9.1% in Medicaid expansion states, compared with 18.1% in non-expansion states. The report also includes estimates for various demographic groups and by health insurance marketplace type. Adults under age 65 were more likely to be uninsured in states with a federally-facilitated marketplace (15.7%) than in states with a state-based (9.1%) or partnership marketplace (7.5%).