retrovirus

(Newser) - Pig organs have long been eyed as transplant options for humans, as the organs are about the same size and pigs are plentiful, but it's been challenging to overcome the human immune system's possible rejection of such organs. Now, in what one medical expert tells the New York ...

(Newser) - There may be hope for the 4 million Americans suffering from the baffling ailment known as chronic fatigue syndrome: A new study firms up the theory that it's caused by a virus, raising the prospect of the first effective treatment. Researchers say they've identified a mouse-related retrovirus in the vast...