09 December 2016
Vol 354, Issue 6317

About The Cover

Cover image expansion

COVER Arab families such as this one by the Red Sea in Jeddah, Saudi Arabia, are often at higher risk of genetic diseases because of the tradition of close cousins marrying. Saudi Arabia has boosted genomics research as part of an effort to help diagnose and prevent such diseases. See page 1217.
Photo: © Reuters Photographer/Reuters