An article in The New York Times reports the United States Preventive Services Task Force “has recommended that Americans ages 15 to 65 be voluntarily screened for H.I.V., the virus that causes AIDS, and that many of those found infected receive antiviral drugs even before symptoms develop.” The CDC has...

A new study in The Journal of the American Medical Association investigated “the association between melatonin secretion and the risk of developing type 2 diabetes … Women with lower ratios of 6-sulfatoxymelatonin to creatinine had increased risk of diabetes (multivariable odds ratio, 1.48 [95% CI,...

The discovery that narcolepsy is “caused by the loss of brain cells that produce hypocretin, a neurotransmitter that promotes wakefulness,” has led to new studies on the neurotransmitter’s involvement in emotion. An article in The New York Times explains that new research “suggests that the brain has...