The Centers for Disease Control and Prevention

Epidemiologists traditionally have depended on what people say to discover how disease spreads. But in investigating Indiana's recent HIV outbreak, the…

The CDC says the death rate for black Americans fell 25 percent over 17 years and was especially dramatic for those 65 and older. But young black people are still dying earlier than white Americans.

The main flu strain circulating now tends to send more people to the hospital than other strains. It also causes more deaths, especially among the elderly, children and people with health issues.

Citing reduced risk of HIV and other sexually acquired diseases, the federal agency says health care providers should discuss circumcision with men as well as parents of infants and teen boys.

A study from the Centers for Disease Control and Prevention finds that 1 in 3 adults drinks excessively. That means eight or more drinks per week for women, and 15 or more drinks a week for men.

Hundreds of people in Mali may have been exposed to Ebola. And there's concern that the country doesn't have the resources or experience to stop this outbreak before it gets out of control.

Health officials estimate that every flu season, 1 in 5 Americans will get the bug. This year, changes in flu vaccines and in federal guidelines could help those most susceptible to the virus.

With the help of online data, doctors and public health officials are tracking the spread of illnesses and predicting where they might strike next. The analyses also provide clues for prevention.

Govs. Chris Christie and Andrew Cuomo have called for mandatory quarantine for "high risk" individuals returning from Ebola-stricken countries. The New England Journal of Medicine begs to differ.

The new protocol announced by Dr. Tom Frieden on Monday stops short of the mandatory 21-day quarantines imposed by some states. Instead, it relies on individual assessment and close monitoring.