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United Nations Secretary-General Kofi Annan shared his hope with a gathering of senior world officials at Headquarters that the 2001 Declaration of Commitment on HIV/AIDS would have heralded a response that matched the epidemic's scale, yet progress had been "significant but insufficient".

A new study demonstrates that the brain's central timekeeper - the biological clock that regulates waking and sleeping cycles - has two parts that fall out of synchrony during light schedule shifts of six hours, the time it takes to fly across the Atlantic.

New York University chemists have employed a computer simulation whose results have enhanced scientific understanding of the DNA transcription process. The study, funded by the National Institutes of Health, appears in the June 7 issue of the Proceedings of the National Academy of Sciences.

A modest suppression of growth hormone and related compounds beginning in early adulthood may delay the onset or progression of several types of cancer, researchers from Wake Forest University School of Medicine and other centers reported today at ENDO 2005, the annual meeting of the Endocrine Society, in San Diego.

Scientists from the Public Health Agency of Canada - with assistance from the U.S. Army Medical Research Institute of Infectious Diseases - have developed vaccines against the Ebola and Marburg viruses that have been shown to be effective in non-human primates.

In a study published in this month's Nature Medicine, Canadian researchers Dr. Heinz Feldmann and Dr. Steven Jones of PHAC's National Microbiology Laboratory and Dr. Thomas Geisbert of USAMRIID report that the vaccines have proven 100 percent effective in protecting monkeys against infection from these often deadly viruses.