Contents

01 January 2016
Vol 351, Issue 6268

About The Cover

Cover image expansion

COVERVials of experimental vaccines against severe acute respiratory syndrome, Marburg virus, and chikungunya sit on ice at the Vaccine Pilot Plant run by the U.S. National Institutes of Health in Frederick, Maryland. In the wake of the Ebola epidemic in West Africa, a growing number of researchers and public health advocates are arguing that more should be done to aggressively advance vaccines that have weak commercial markets but appear feasible.See page 16.
Photo: © Ken Garrett