Neglect, stress and abuse are all more common among the poor. New studies show that these factors can cause long-term changes in learning, brains and behavior, and suggest how to prevent damage in the vulnerable years. Could treating depressed mothers promote healthy interactions with their kids?

The long rise may be inflated by redefinition of autism, social acceptance of the disabled and desire for services. If this is a real epidemic, it’s even more critical to find the cause.

Flu vaccine is made in eggs, but that’s too slow for a major epidemic. How are vaccines made inside animal cells? What other methods can protect us against a fast-changing, deadly virus?

Golfer-doctor finds that treating apnea cuts golf scores; sees new motivator for wearing nighttime masks.

Until now, getting a picture of genetic change in a tumor over time has been next to impossible. A new study reveals that cancer’s genetic tangle gets more complicated with time.

Virologists have been working late since swine flu appeared in April. With flu running amok in South America, what can we expect when the epidemic returns north this fall?

Companies are marketing genetic tests direct to consumers. Some tests can be lifesavers. But many tests return confusing results, which even doctors have a hard time interpreting.

The epidemic fades, with 61 confirmed deaths and 5,251 cases so far. Were the public health warnings overdone? Or did they help stem the pandemic? Your guide to the time of finger-pointing, flu-style.

As the day wears on, both sleep pressure and the brain’s alerting signal rise, until sleep pressure triumphs. [Nod]. New brain study explains why night owls don’t get as sleepy during the day.

New video captures AIDS moving inside immune cells: HIV enters pods that form on the surface, then jumps across into a healthy immune cell that is now doomed to spread HIV — and die.