Jul 05
Nicotine, the reason why people smoke, chew or snort tobacco, is hard to quit. The American Heart Association says nicotine is about as addictive as heroin or cocaine, which explains why your cig-sucking coworkers get so grumpy and antsy leading up to a smoke break. Since quitting is so difficult and relapsing is so easy, scientists are eyeing vaccines that make addicts immune to nicotine
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