For Nina Craig, lifting two 50 pound bales at a time isn't easy.

And it was a lot harder when she was still smoking cigarettes.

"I can breathe so much more easily," said Craig. "I'm not getting winded, I'm not breaking a sweat as easily. It's already a noticeable difference in just four days."

It's been less than a week, but Craig says she can already notice a difference in her energy level, now that she's cut smoking out of her life.

And she's doing it through the help of an experimental medication from the UW.

But now, there's a new, possibly even more effective method, than the pills Nina Craig is taking.

"This is really a totally novel way for smokers who want to quit, to do that successfully," said Dr. Michael Fiore, UW Center for Tobacco Research and Intervention.

Fiore is looking for smokers who want to quit and are willing to try an experimental new vaccine.

Fiore says the vaccine is safe for humans, and works by building antibodies that fool the brain into turning the addictive part of smoking into an unpleasant sensation.

"Overtime, they don't really enjoy that smoking anymore and if it works as predicted, they won't enjoy smoking and they'll gradually stop smoking," said Fiore.

Fiore says quitting still won't be easy for some people, but the vaccine could provide much needed help.

And former smoker Nina Craig, says a little help, can go along way.

"This is something I definitely think people need all the support they can get," said Craig, "because there are a lot of hurdles and it's so easy to backslide."

If you'd like to be a part of the study, there's a hot line to call.

The number is (877) END CIGS.

There's also a web site with more information ... www.endcigs.com.