This audio summary is sponsored by Medtronic, innovating for life, committing to changing the way the world treats chronic disease. Learn more at medtronic.com. Welcome to the New England Journal of Medicine audio summary for the weekThis summary covers the issue of January 28, 2010. I'm Dr Lisa Johonson. This week's issue featuresFeatured are articles on rotavirus vaccine and severe gastroenteritis in African infants, effect of rotavirus vaccine on death from childhood diarrhea in Mexico, outcomes after internal versus external tocodynamometry for monitoring labor, vaccine-acquired rotavirus in infants with severe combined immunodeficiency, increased ambulatory care copayments and hospitalizations among the elderly, and insight into insulin secretion; a review article on Alzheimer’s disease; a case report of an infant with developmental delay and irritability; and Perspective articles on tobacco control and free speech, on medicine’s ethical responsibility for health care reform, and on American values and health care reform.