Many children lack second dose of H1N1 flu vaccine

As many as 80% of children in some states who received a first dose of H1N1 vaccine haven't received a booster dose that's necessary to fully protect them from swine flu, according to a USA Today review of immunization registry data from 10 states. State health officials are worried growing public complacency could put these children at risk if a third wave of disease hits this winter. Because there are there are no national data on the second doses. USA Today sought data from the 14 states that the CDC says require all H1N1 doses be recorded in immunization registries; four didn’t provide data.