On the surface of the flu virus sits a mushroom-shaped protein with a head that changes and a stem that stays more constant; current vaccines target the head so they must change each year; could a vaccine that targets the stem offer broader, multi-year protection?
Fuente : http://www.eurekalert.org/pub_releases/2013-12/sso...
Fuente : http://www.eurekalert.org/pub_releases/2013-12/sso...