2009 H1N1 swine flu: the 2010 perspective.

In May 2009, as the H1N1 swine flu outbreak was in the early stages, a conference was held at the New York Academy of Sciences to discuss what was known about the virus and what was being done to stop the outbreak. In May 2010, a follow-up conference was again held at the New York Academy of Sciences, but now to discuss the H1N1 outbreak retrospectively. The report presented here summarizes the 2010 conference proceedings.