DNA has been observed moving from one cell to another for the first time in animals.
Using marijuana daily for four years or longer may be related to certain changes in the brain, according to new research.
The man's condition is declining as officials monitor people he has come in contact with for signs of the Ebola virus.
The United States has diagnosed its first case of the deadly Ebola virus, the Centers for Disease Control and Prevention said on Tuesday.
Hundreds of children in the United States are being hospitalized for with a serious respiratory illness known as Enterovirus D68. Continue reading →
Many potential drug cures remain in the laboratory -- and one treatment won't fit all.
Dirty needles and other carelessness can spread serious diseases among acupuncture patients.
Health care officials hope to contain the MERS virus in the U.S.
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