title: Poliovirus evolution: the strong, silent type.
abstract: The high mutation rates of poliovirus and other RNA viruses promote viral diversity by rapid sampling of mutations. In this issue, Lauring et al. (2012) report that underlying synonymous codon variation in virus populations can have a considerable impact on adaptive potential with implications for viral fitness and virulence.
authors.affiliation: Department of Human Genetics, University of Utah, School of Medicine, Salt Lake City, UT 84112, USA. nelde@genetics.utah.edu
authors.forename: Nels C
authors.initials: NC
authors.lastname: Elde