In the May 26 (2011) issue of Nature, Vijaykrishna et al. address patterns of evolution and transmission exhibited by swine influenza A viruses (SwIV) isolated from pigs beings slaughtered in Hong Kong between May 1998 and January 2010. Although the focus of the...
Among human pathogens, Streptococcus pneumoniae holds an especially prominent place in the history of biomedical investigation. Griffith (1928) described the transforming principle, a soluble substance released by dead, virulent pneumococci that could render...