A Universal Vaccine for the flu?

http://www.newscientist.com/article/dn16653-hidden-weakness-could-yield-universal-flu-vaccine.html

This is a interesting article. Apparently the flu has been fooling our immune system. Typically when the virus enters the body, the immune system would respond by sending antibodies to attack the head of the virus. the problem with the flu is the surface protein or the head constantly changes. So this means no one vaccine will make you immune to the flu forever. But what scientists have discovered is the stalk of the virus typically remains the same. They devised antibodies to attack specifically the stalk of the virus. This killed off the virus and prevented the flu in a couple of mouses.

This discovery could lead to a Universal Vaccine that works for years instead of months.