Today's big flu news comes out of Australia, where researchers say one dose of the H1N1 vaccine may be enough protection for kids. The U.S. Centers for Disease Control and Prevention, which currently recommends two doses for children age nine and under, disagrees in an accompanying editorial in the Journal of the American Medical Association.
WebMD has more on the study and the CDC's response. The paper can be found here; a subscription is needed to view the full text.