Diseases, Conditions, Syndromes

Death toll rises as flu epidemic grips US

The death toll from a flu outbreak gripping the United States has reached epidemic levels and it will be at least several weeks before the outbreak abates, health officials said Friday.

HIV & AIDS

RV144 vaccine efficacy increased against certain HIV viruses

Scientists used genetic sequencing to discover new evidence that the first vaccine shown to prevent HIV infection in people also affected the viruses in those who did become infected. Viruses with two genetic "footprints" ...

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