Emerg Infect DiseidEmerging Infectious Diseases1080-60401080-6059Centers for Disease Control114856682631854Research ArticleMigrating populations--a closer view of who, why, and so what.CooksonS. T.scookson@cdc.govCarballoM.NolanC. M.KeystoneJ. S.JongE. C.Centers for Disease Control and Prevention, Atlanta, Georgia 30333, USA.200173 Suppl551551