11.   Scientists say they have devised a vaccine that blocks nicotine from entering the brain, raising the prospect of a novel way to help smokers quit.

12.   The Alkermes compound is designed to cross the blood-brain barrier, which prevents substances in the blood as well as drugs from entering the brain.

13.   The bullet entered her brain through her forehead, killing her instantly.

14.   The organism enters the brain and begins causing life-threatening swelling and seizures, Murphey said.

15.   This hypothesis holds that the disease is caused by abnormal forms of proteins called prions that enter the brain and cause a sort of chain reaction.

16.   Treating the defense lawyers with extreme caution, Louima answered questions as if they entered his brain on a time delay.

17.   When the two molecules were coupled, they readily entered the brain.

18.   Eventually, the parasites carrying the disease enter the brain, causing severe pain and death.

19.   It enters the brain and permanently destroys the optic nerve.

20.   One man was in a coma after a rubber bullet penetrated his right eye and entered his brain, hospital director Yousef Shaarawi told The Associated Press.