Second Maryland Man to Receive an Altered Pig’s Heart Has Died

Researchers said they found signs of organ rejection, which the genetically modified tissue was supposed to prevent.

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Panel Tells F.D.A. That CRISPR Sickle Cell Cure Is Safe Enough for Patients

The decision by an advisory committee may lead to Food and Drug Administration approval of the first treatment for humans that uses the CRISPR gene-editing system.

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Bariatric Surgery at 16

If childhood obesity is an ‘epidemic,’ how far should doctors go to treat it?

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Hearing Aids Are More Affordable, and Perhaps More Needed, Than Ever

Over-the-counter devices have been available for a year now. New research suggests they may have unexpected benefits.

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Doctors Wrestle With A.I. in Patient Care, Citing Lax Rules

The F.D.A. has approved many new programs that use artificial intelligence, but doctors are skeptical that the tools really improve care or are backed by solid research.

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How a Lucrative Surgery Took Off Online and Disfigured Patients

More surgeons are opting for a complicated hernia repair that they learned from videos on social media showing shoddy techniques.

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Eyedrops From Major Brands May Cause Infection, F.D.A. Says

Target, CVS and Rite Aid are pulling products from shelves after federal investigators found unsanitary conditions and recommended a recall.

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CUNY Halts Investigation of Alzheimer’s Researcher

Citing questions about the integrity of the process, the university said that “no final action” had been taken.

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Few Americans Have Gotten the New Covid Shots, C.D.C. Finds

About 7 percent of adults have rolled up their sleeves for the new vaccines, according to new agency data.

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How to Protect Your Teeth From Halloween Candy, According to a Dentist

A dentist shares five tricks for managing treats.

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Is Social Media Addictive? Here’s What the Science Says.

A major lawsuit against Meta has placed a spotlight on our fraught relationship with online social information.

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Bush’s Institute Issues an Urgent Plea for Congress to Renew His AIDS Program

PEPFAR, created by President George W. Bush in 2003 to combat the disease, faces an uncertain future now that its authorizing legislation has lapsed.

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Dr. Donlin Long, Wide-Ranging Medical Innovator, Is Dead at 89

A neurosurgeon, he helped develop an insulin pump for diabetes patients and a device to relieve pain, and joined Ben Carson in a historic operation on conjoined infants.

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Meta Sued Over Features That Hook Children to Instagram, Facebook

More than three dozen states and the District of Columbia accused the tech giant of knowingly using addictive features to draw in and retain children and teenagers.

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How Aid in Dying Became Medical, Not Moral

The debate over aid in dying still rages in the language that medicine and the media use to describe the practice.

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Psychedelic Mushrooms Hit the Market in Oregon

The state has pioneered a therapeutic market for psychedelic mushrooms. Researchers are watching with a mix of excitement and unease.

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How Much Do Ozempic and Wegovy Cost? Not What You Think.

Drug companies are making billions from a new class of in-demand weight-loss treatments. But the prices are not what they seem.

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In Global Conflict Zones, Hospitals and Doctors Are No Longer Spared

Over the last two decades, medical facilities and staff have become casualties of war more frequently, in violation of international law.

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To Combat the Opioid Epidemic, Cities Ponder Facilities for Drug Use

Philadelphia is again the focus of a national campaign to open — or restrict — sites where people use drugs under medical supervision.

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How an ‘Effort-Reward Imbalance’ Can Make Work Miserable

Experts offer tips on what to do if you’re not getting the respect or compensation you deserve.

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David Shaffer, Medical ‘Detective’ in Suicide of Youths, Dies at 87

At a time when teen suicide was seen as random and unpredictable, Dr. Shaffer, a psychiatrist, led investigations that proved that it was not.

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If You’ve Ever Heard a Voice That Wasn’t There, This Could Be Why

With a ghostly finger in a lab, researchers coaxed people to hear phantom voices.

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Roland Griffiths Is Dead at 77; Led a Renaissance in Psychedelics Research

The drugs had been the third rail of scientific inquiry. But in a landmark study, he saw them as a legitimate way to help alleviate suffering and even to reach a mystical state.

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Fight Over Covid Lab Leak Stalls Virology Research

Scientists doing “gain-of-function” research said that heightened fears of lab leaks are stalling studies that could thwart the next pandemic virus.

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Harvard Cozies Up to #MentalHealth TikTok

As young Americans turn to TikTok for information on mental health, the T.H. Chan School of Public Health at Harvard is building its own team of influencers.

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Lab Leak Fight Casts Chill Over Virology Research

Scientists doing “gain-of-function” research said that heightened fears of lab leaks are stalling studies that could thwart the next pandemic virus.

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Robert Sapolsky Doesn’t Believe in Free Will. (But Feel Free to Disagree.)

Shedding the concept “completely strikes at our sense of identity and autonomy,” the Stanford biologist and neurologist argues. It might also be liberating.

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Wearables Track Parkinson’s Better Than Human Observation, Study Finds

Researchers demonstrated that off-the-shelf sensors can measure the subtle changes of disease progression.

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Scientists Investigating Alzheimer’s Drug Faulted in Leaked Report

A professor at the City College of New York engaged in “significant research misconduct,” an expert committee concluded.

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California’s Ban on Red Food Dye Puts FDA on the Spot

The dye was banned in cosmetics after a study suggested it might be a carcinogen. Yet federal regulations still permit its use in foods, stoking concerns that helped build support for the new state law.

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Doctors at Allina Health Form Union

The physicians, at Allina Health in Minnesota and Wisconsin, appear to be the largest group of unionized doctors in the private sector.

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FDA Moves to Ban Sale of Vuse Menthol Vapes

R.J. Reynolds menthol e-cigarettes are top sellers with an estimated $1.6 billion in annual sales. The company vowed to fight the ruling in court.

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Kaiser Permanente Reaches Tentative Deal With Health Care Workers

The proposed settlement follows a three-day strike involving thousands of unionized workers in several states.

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The Human Brain Has a Dizzying Array of Mystery Cells

Researchers identified some 3,300 types of brain cells, an order of magnitude more than was previously known, and have only a dim notion of what most of them do.

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Hoosen Coovadia, 83, Medical Force in South Africa’s H.I.V. Fight, Dies

An esteemed pediatrician, he overcame apartheid’s barriers to help make his country a global leader in H.I.V. care and research.

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Younger Women Get Lung Cancer at Higher Rates Than Men

Researchers are struggling to understand what is driving the gender disparity in lung cancer cases among people 35 to 54.

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¿Te sientes mal tras la vacuna contra la covid? Quizás es porque está funcionando

Fiebre, escalofríos y fatiga pueden ser signos de una producción vigorosa de anticuerpos, según un nuevo estudio.

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What Is a Fever? Why Your Body Temperature May Be Cooler Than 98.6 Degrees

Here’s why we appear to be getting cooler, and what that could mean when it comes to fevers.

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FDA Issues Warning Over Misuse of Ketamine Therapy

Unsupervised treatment — fueled by telemedicine prescriptions — for various psychiatric problems poses a number of health risks, the agency said.

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New A.I. Tool Diagnoses Brain Tumors on the Operating Table

A new study describes a method for faster and more precise diagnoses, which can help surgeons decide how aggressively to operate.

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Scientists Use CRISPR to Make Chickens More Resistant to Bird Flu

A new study highlights both the promise and the limitations of gene editing, as a highly lethal form of avian influenza continues to spread around the world.

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Lawsuit Challenges Insurance Restrictions on Weight Loss Drugs Like Wegovy

Many employers and government programs won’t cover costly obesity medications. A lawsuit is challenging one such policy.

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Skeletons of 1918 Flu Victims Reveal Clues About Who Was Likely to Die

While a narrative emerged that the pandemic indiscriminately struck the young and healthy, new evidence suggests that frail young adults were most vulnerable.

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Teen Depression Rose During Pandemic, With Racial Gaps in Treatment

Approximately 20 percent of teenagers had major depressive disorder in 2021, but less than half who needed treatment received it, a new study found.

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Her Strange Blisters Wouldn’t Go Away. What Was It?

It started with a bout of dry, itchy skin. Soon everything hurt. A specialist found a way to find some relief.

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Feeling Terrible After Your Covid Shot? Then It’s Probably Working.

Fever, chills and fatigue may all be signs of vigorous antibody production, a new study finds.

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Kaiser Permanente Health Workers Near End of Strike

Friday was the third day of a walkout for thousands of health care employees. No new contract talks were scheduled until next week.

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My Husband Is Facing Dementia. Can I Help Him End His Life?

The magazine’s Ethicist columnist on how to assist a spouse in the midst of a life-or-death dilemma.

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Dissociation Is Big on TikTok. But What Is It?

People are turning to social media to define dissociative disorders, but those portrayals aren’t always accurate. Here is a primer.

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The Wegovy Shortage Drags On, Leaving Patients in Limbo

The situation has left many patients frustrated and unable to start taking the weight loss drug.

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Workers Exposed to Extreme Heat Have Few Protections

Tens of millions of Americans are struggling to cope with soaring temperatures. OSHA is developing new workplace safety standards, but they are not yet complete.

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Gun Deaths Rising Sharply Among Children, Study Finds

Firearm injuries are a leading cause of death among young children and teenagers in the United States.

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Food Industry Influence Could Cloud the U.S. Dietary Guidelines, a New Report Says

The process of updating the healthy eating recommendations has become more transparent in recent years, but conflicts persist.

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How the Kaiser Permanente Strike Could Affect Patients

Especially in California, people could experience delays in appointments or test results and even have medical procedures postponed after thousands of health care workers walked out.

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Kaiser Permanente Health Care Workers Go on Strike

The health system failed to reach a new contract agreement with some of its unionized employees, who have planned a three-day job action in Kaiser’s facilities in several states.

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The Mystery of My Burning Esophagus

As a science writer, I’ve spent years covering the rise of allergic conditions. Why couldn’t I figure out my own?

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A New Way to Prevent S.T.I.s: A Pill After Sex

The Centers for Disease Control and Prevention plans to recommend a widely used antibiotic, though not for everyone just yet.

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Kaiser Permanente Workers Poised to Strike

The health care system provides care for 13 million people in eight states. Union officials say this could be the largest strike by health care workers in recent U.S. history.

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In the Big City, Wildlife Researchers Are On the Prowl

Scientists are studying urban animals and the diseases they carry, to understand the potential risks to people, pets and the animals themselves.

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Nobel Prize Awarded to Covid Vaccine Pioneers

The physiology or medicine prize for Katalin Karikó and Drew Weissman recognized work that led to the development of vaccines that were administered to billions around the world.

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A Nobel Prize Might Lower a Scientist’s Impact

A team of researchers at Stanford find that older scientists are less productive after winning major awards like the Nobel and the MacArthur Fellowship.

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