Scientists are making progress on a nicotine vaccine that could provide a lifetime shield from the drug’s addicting properties. The addictiveness of nicotine has been the subject of much discussion on sites like www.ProjectKnow.com, which also emphasize how hard it is to kick the habit. This vaccine, however, gives smokers around the world hope; it is believed that this method could help not only those currently addicted, but potentially prevent future addiction altogether.