image: These are maps of geographic variation in timing of rotavirus epidemics and birth rates in the United States, 1991-1997. This image relates to an article that appeared in the July 17, 2009, issue of Science, published by AAAS. The study, by Dr. V.E. Pitzer of the Pennsylvania State University in State College, Pa., and colleagues, was titled, "Demographic Variability, Vaccination, and the Spatiotemporal Dynamics of Rotavirus Epidemics." view more
Credit: Image copyright Science/AAAS