Chicago health officials issue urgent alert after seven meningococcal disease cases, including two deaths. Know the symptoms and warning signs.

How long are you contagious with the flu? Experts say you can spread the virus for five to seven days after symptoms start, sometimes longer for children and adults.

Viral 75 Hard fitness challenge promises rapid weight loss through extreme daily rules and mental toughness, but experts warn the intense regimen may be unrealistic.

Swedish researchers discover a blood test that can detect Parkinson's disease up to 20 years before symptoms appear, offering hope for early intervention.

Colorado officials declared a disaster emergency after a presumptive bird flu outbreak hit a facility with 1.3 million chickens in Weld County. The state is mobilizing resources.

Conversation starters, celebrity health reveals, healthy living hacks and medical cautions: Here's what you missed in Fox News Health this week

In a death-defying feat, Alex Honnold of the U.S. scaled Taipei 101 in Taiwan with no ropes or support. Scientists reveal how his fearless brain is different from other brains.

New research reveals marijuana users face 29% higher heart attack risk and doubled cardiovascular death chances, plus brain and sleep health impacts.

New study reveals men face heart attack risk seven years earlier than women, starting in mid-30s. Northwestern research highlights the need for earlier screening.

A U.K. study finds that identifying eating profiles through an online quiz can improve engagement and adherence in digital weight-loss programs.

Genetic study reveals that people who have elevated blood glucose two hours after eating face significantly higher Alzheimer's disease risk. University of Liverpool researchers analyzed data.

New research reveals evening people experience circadian misalignment that may lead to cardiovascular problems, affecting diet, sleep and heart health.

New federal dietary guidelines urge Americans to limit alcohol intake, moving away from “moderate drinking" rules as experts warn no amount is truly safe.

A new mom thought drinking wine was causing strange pain and itching. Months later, a lump in her neck revealed a shocking blood cancer diagnosis.