2011 meta-study published in the journal The Lancet on the effectiveness of vaccinations in the United States at preventing influenza.
2014 report from the U.S. Census Bureau paints a detailed picture of those over 65 in the United States, including health care spending, employment and diversity.
2014 study in Environmental Health Perspectives on the effect of global warming on future heat waves and their subsequent impact on human health.
2014 study in Annual Review of Political Science looking at the impact of the Great Recession and demographic shifts on state and local finance.
2013 study from Kent State on the effects of winter weather and other scientific findings that add context to cold weather patterns and human impact.
2013 study in the New England Journal of Medicine calculating that the total cost of dementia for America was as high as $215 billion in 2010.
2012 study from the Harvard School of Public Health and the University of Michigan on how summer temperatures can affect the elderly suffering from chronic diseases.
2013 study in Proceedings of the National Academy of Sciences on the relationship between increasing social isolation and ill health among older people.
2012 report from the federal government on the solvency and long-term forecasts of entitlement programs in the United States.
2012 study from Harvard Medical School in Applied Economic Perspectives and Policy on the effect of market factors on the quality of long-term care.