About 1 in 8 adolescents and young adults in the U.S. are using AI chatbots for mental health advice, according to a new study published in th…

The Rev. Jesse Jackson's family says that the civil rights leader has been released from a hospital where he was treated for a rare neurological disorder. Yusef Jackson said Tuesday that his father was discharged from Northwestern Memorial Hospital in Chicago. The 84-year-old Jackson is an internationally known civil rights leader and two-time presidential candidate. He was diagnosed with Parkinson's disease in 2013. That diagnosis was changed last spring to progressive supranuclear palsy, or PSP. While hospitalized, Jackson's visitors included former President Bill Clinton and former Secretary of State Hillary Rodham Clinton. Yusef Jackson thanked friends and supporters who are praying for the Rev. Jackson.

“My year of unraveling” is how a despairing Christy Morrill described nightmarish months when his immune system hijacked his brain.

It's one of medicine's biggest mysteries — why sometimes our immune system attacks our own bodies. Autoimmune diseases affect as many as 50 million Americans and millions more worldwide. They're hard to diagnose and treat, and they're on the rise. A Massachusetts woman's journey with one named lupus — called the disease of 1,000 faces for its baffling variety of symptoms — offers a snapshot of the burden. Now researchers are decoding the biology behind these debilitating diseases in hopes of eventually treating the causes, not just the symptoms.

The Rev. Jesse Jackson is in the hospital with a rare neurological disorder. Jackson's Chicago-based civil rights organization says the 84-year-old has progressive supranuclear palsy and is under observation. Jackson has suffered from symptoms consistent with Parkinson's disease and disclosed a diagnosis in 2017. But during a Mayo Clinic visit in April, doctors confirmed a diagnosis of PSP, which can have similar symptoms to Parkinson's. He has continued to make public appearances including at last year's Democratic National Convention. He's been using a wheelchair and family members say he can no longer speak.

A mosquito-borne virus more common in South America has been detected in the United States. Health officials say the chikungunya virus has been identified in a patient living in the suburbs of New York City who began experiencing symptoms in August. Authorities say it's the first locally acquired case identified in any state since 2015, meaning the patient didn't travel outside the country before becoming infected. It's also the first locally acquired case that New York has ever seen. Chikungunya typically produces symptoms including fever, muscle pain, nausea, fatigue and a rash.

At-home tests of the gut's microbiome are trending, but doctors say the technology is getting ahead of medical knowledge. In many cases, there is no proven way to treat the imbalances that the tests claim to find. The companies and medical researchers say they hold great promise to one day personalize the treatment of complex gut-brain diseases. But much more clinical research and regulation is needed. The gut microbiome is complex and poorly understood. Growing evidence links changes in the gut to diseases like diabetes, liver disease, obesity and inflammatory bowel disease, but it's often unclear whether those changes cause, or result from, illness.

A recent study of schoolchildren finds that the youngest students harbor the most germs. Researchers looked at nasal swabs and symptom reports of more than 800 students and staff in Kansas City, Missouri. Kids in pre-kindergarten and elementary school had the highest rates of virus detection compared with older students and staff. The pre-K kids, ages 3 to 5, had the highest rates of actual illness, too. Young children can have up to 10 respiratory viruses as their immune systems are introduced to different infections for the first time. Those viruses include colds, flu and more.