That's for the HN come from, H1N1. Problem is, thoseproteins are moving target, they mutatequickly. Once they do, your immune system can't recognize them. And you gotsomething like 2009 swineflu. As the strain flu shot never *primed us to fight.

 

To make more universal vaccine, we worked year after year. Researchers focused onsmaller, more stable protein, called M2. In human's strains, these proteinshardly change since the 1930s. Research engineer in the M2 vaccine and gave to mice, then they exposed the mice to lethaldoses to human, swine and bird flues.

 

All the vaccine micesurvived, they are unlucky counterparts, didn't. The research appears inJournal Molecule Therapy.

 

A good seasonal flu vaccine were still beat the M2 vaccine. But the M2 gives us insurance against a surprisedstrain. Well, it might worth a shot.