Resumen de Letters.

Susan Russell, Meredith Minkler, Frederick Marais, Hatem A. Tawfik, Paul Goldsmith, Darek Lis, Harold Wilkinson, Evelyn Mcdonald, Bruce Emerick, Richard Poole, Rudy Iwasko

• Several letters to the editor are presented in response to articles in previous issues including "Oceans from the Skies" by David Jewitt and Edward D. Young, "Ebola War" by Helen Branswell, and "Shock Medicine" by Kevin J. Tracey, all published in the March 2015 issue.