Data Points: MERS cases total 401 worldwide, with first U.S. case reported in April

Number of states where the total number of adults with poor health-related quality of life increased in 2014 compared with 2009—Commonwealth Fund

Number of confirmed global cases of Middle East respiratory syndrome since 2012, with the first U.S. case confirmed April 28 in Indiana. Thirty percent of MERS victims have died. —Centers for Disease Control and Prevention

Estimated annual number of U.S. patients who experience outpatient diagnostic errors, half of which are potentially harmful—BMJ Quality & Safety

Estimated decrease in number of deaths per 100,000 Massachusetts residents between ages 20 and 64 from 2007 to 2010 (nearly 3%) after the state's healthcare reform insurance expansion, compared with 2001 to 2005—Annals of Internal Medicine

Number of U.S. hospital readmissions in 2011 for maintenance chemotherapy, the condition with the largest number of readmissions for privately insured patients—Agency for Healthcare Research and Quality

Percentage of U.S. adults without health insurance in April, the lowest level since Gallup started tracking the uninsured rate in January 2008, with the decline sharpest among Hispanics, blacks and low-income people—Gallup-Healthways Well-Being Index poll