19 June 2009
Vol 324, Issue 5934

About The Cover

Cover image expansion

COVER The current global outbreak of influenza A (H1N1) in humans appears to have originated in Mexico from infected pigs. The cover portrait is of "Patient Zero" from La Gloria, Veracruz, who is now well. Fraser et al. (page 1557 ) report on an initial epidemiological analysis and offer baseline estimates for transmissibility while acknowledging the prevailing uncertainties at this early stage of the epidemic. Photo: Erich Schlegel/Rapport/Newscom