When a friend or coworker is sick with the flu, people tend to take precautions to avoid getting sick themselves. But it may not always be obvious that someone is carrying the flu virus.

Most of the press around the start of flu season focuses on high-risk groups, such as children, the elderly, pregnant women and those working in healthcare. But others are at risk too.

The flu vaccine is not perfect, but it has been shown to reduce a person's risk of getting the flu. For children in particular, this can mean avoiding the hospital.

Sleep apnea affects about a fifth of Americans and has been linked to heart disease and brain dysfunction. It's possible that this condition is associated with lung disease as well.

This year’s flu vaccine provides protection against the most common strain of flu this year, H1N1. The flu is still infecting people, and it’s not too late to get vaccinated.

Previous research established a link between prenatal exposure to infection and later schizophrenia. New research aimed to see if this same link was present for bipolar disorder.

Doctors recommend annual flu shots to help patients stay healthy during flu season. New research suggests that the flu vaccine also might help prevent stroke.

Many young to middle-aged adults might brush off flu season as no big concern for them. But this season, the flu has hit the young hard.

Tuberculosis is not a common disease in the US, but it does occur, even among children. So, who are those children?

Though the flu strikes every year, each season can be different. Researchers behind a new study uncovered some surprising trends about this season's flu.