image: Infectious particles of the avian H7N9 virus emerge from a cell. This image relates to a paper that appeared in the Aug. 7, 2013, issue of Science Express, published by AAAS. The paper, by Ron A.M. Fouchier at Erasmus Medical Center in Rotterdam, Netherlands, and colleagues was titled, "Gain-of-Function Experiments on H7N9." view more
Credit: [Image courtesy of Takeshi Noda/University of Tokyo]