Contents

14 July 2017
Vol 357, Issue 6347

About The Cover

Cover image expansion

COVER A groundskeeper sprays pesticide to control mosquitoes in Miami, Florida, in 2016. Zika virus is spread by the ubiquitous Aedes aegypti mosquito. This flavivirus has caused a huge outbreak of infection across South America, where it has been associated with neurological abnormalities in newborn children. The virus has spread north, and cases of infection have been detected in the United States. For more on anticipating infectious disease outbreaks, see page 144.
Photo: © Gaston De Cardenas/Miami Herald/TNS via Getty Images