dbune writes: A universal flu vaccine has been tested by scientists at Oxford University. The immunization could provide protection against all known strains of the flu, which will protect billions more against the flu virus. The vaccine hits a different part of the flu virus and does away with costly yearly re... Link to Original Source
We warn the reader in advance that the proof presented here depends on a
clever but highly unmotivated trick.
-- Howard Anton, "Elementary Linear Algebra"