Link to the Show / Show Notes This summary covers the issue of December 31, 2009. Featured are articles on MMP12, lung function, and COPD in high-risk populations; genetic susceptibility to infection by Mycobacterium leprae; household transmission of 2009 H1N1 influenza; outbreak of 2009 H1N1 influenza at a New York City School; public reporting of discharge planning and rates of readmissions; and molecular control of age-related diseases; a review article on activated protein C for sepsis; a case report of a boy with hypothermia and frostbite; and Perspective articles on abortion politics and health insurance reform, on Australia's winter with the 2009 pandemic influenza A (H1N1) virus, on the emotional epidemiology of H1N1 influenza vaccination, and on industry influence on comparative-effectiveness research funded through health care reform.