Scientists say they have decoded the entire genetic content of the HIV-1 virus, a key source of Aids infection.

Writing in the journal, Nedergaard's team describe how acupuncture reduced pain by two thirds in normal mice, but had no effect on the discomfort of mice that lacked the adenosine receptor gene.

Genetic marking is the equivalent of giving every book a title, table of contents and index-and with much greater speed and accuracy than any librarian could manage.