A universal soldier against all flu strains?

One way to beat viruses is to knock them out with antiviral drugs. Another is to vaccinate against them beforehand. While this may work for some, such as measles and mumps, others, like influenza, are proving far trickier to pin down. Until recently, scientists thought it was impossible to develop broad-acting flu vaccines. But one EU-funded project, Universal Vaccine, is on track to proving them wrong.