The battle against multiple sclerosis

A paralyzed military veteran is one of seven people in the country to be implanted with an Elon Musk-backed brain chip as part of a clinical trial underway in South Florida.

Mycoplasma pneumoniae (M. pneumoniae)-associated community-acquired pneumonia (CAP) incidence was significantly higher in 2024 than in 2018 to 2023 among children, according to research published in the U.S. Centers for Disease Control and Prevention Morbidity and Mortality Weekly Report.

According to a study published in JAMA Network Open, 70% of U.S. adults would conduct a home test for suspected COVID-19.

The U.S. Food and Drug Administration is revising the labeling of all extended-release attention-deficit/hyperactivity disorder (ADHD) medications, including certain formulations of amphetamine and methylphenidate, to warn about the medication's risk for weight loss and other adverse reactions in patients younger than 6 years of age.

The federal government estimates there are 2.6 million immigrants living in California without legal status. The state had gradually sought to bring these immigrants into its Medicaid program, known as Medi-Cal.

Not so long ago, undergoing a total hip or knee replacement and recovery was a grueling and often painful ordeal. While these are still major surgeries, new techniques and technologies are redefining them—and improving people's outcomes.

From a barbecue explosion to a severe firework injury, a lot can go wrong when celebrating the Fourth of July.

President Donald Trump's "One Big Beautiful Bill" cuts federal spending on Medicaid and Affordable Care Act marketplaces by about $1 trillion over a decade, according to the nonpartisan Congressional Budget Office, threatening the physical and financial health of tens of millions of Americans.

As summer ushers in peak mosquito season, health and vector control officials are bracing for the possibility of another year of historic rates of dengue. And with climate change, the lack of an effective vaccine, and federal research cuts, they worry the disease will become endemic to a larger swath of North America.

Conversations allow humans to communicate their thoughts, feelings and ideas to others. This in turn enables them to learn new things, deepen their social connections, and co-operate with peers to solve specific tasks.

Inappropriate polypharmacy—the excessive or unnecessary use of multiple medications—is a major driver of emergency hospital admissions among adults aged 65 and over, according to a new study from the University of Bath in the UK.

Researchers have long focused on the STING (Stimulator of Interferon Genes) pathway as a way to harness the immune system's natural defenses against cancer. This pathway, which plays a key role in helping the body defend against potential pathogens, can be leveraged to trigger an innate immune response that targets cancer cells. However, a study published in the journal Nature Chemical Biology, led by biochemist Lingyin Li, is spearheading a new school of thought.

A research team has discovered that a specific group of neurons in the amygdala, a brain region involved in emotion regulation, plays a key role in the emergence of conditions such as anxiety, depression, and altered social behavior. This study, published in iScience, shows that restoring the neuronal excitability balance in a specific area of the amygdala is enough to reverse these behaviors in mice.

Kentucky has its first measles outbreak of 2025, as the U.S. case count sits just short of a 30-year high.

An Australian man has died from an "extremely rare" rabies-like infection transmitted by a bat bite, health officials said Thursday.

A new study from Mass General Brigham researchers offers a stark reminder of how pervasive cell phone use while driving is among young people. The study team developed and disseminated a questionnaire to over 1,100 participants and conducted 20 interviews for high school students to identify the factors influencing them to engage in distracted driving. They found an average of 21% of teen drivers drive distracted and share other insights behind the behavior. Their results are published in Traffic Injury Prevention.

Bicycling is a great way to stay active and enjoy the outdoors. Whether you're a recreational rider or a daily commuter, it's important to protect your hands and wrists. Dr. Sanj Kakar, a Mayo Clinic orthopedic surgeon specializing in hands and wrists, shares practical tips to prevent injuries while biking.

Disrupted care during the COVID-19 pandemic led to sharp increases in other non-COVID causes of illness and death, particularly mental health disorders, malaria in young children, and stroke and heart disease in older adults, finds a study published by The BMJ.