Scientists Grow More Hopeful About Ending a Global Organ Shortage

At an international conference, researchers at the forefront of animal-human transplantation compared notes and allowed themselves the first real optimism in decades.

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Merck PCSK9 Pill Results Point to Extremely Low Cholesterol Future

The drug targets the PCSK9 protein, and could give millions of people a more affordable option to reduce their heart disease risk.

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What Scientists Are Learning From Brain Organoids

Lab-grown “reductionist replicas” of the human brain are helping scientists understand fetal development and cognitive disorders, including autism. But ethical questions loom.

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Radiation May Be Unnecessary for Many Breast Cancer Patients

Doctors have already begun reducing radiation treatment for women at low risk of recurrence or spread of the disease. A new study finds that some women at greater risk can safely avoid radiation.

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Study Finds Evidence That Text-Based Therapy Eases Depression

A large-scale randomized trial of texting therapy concluded that its outcomes were as good as video sessions in treating depression.

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F.D.A. Moves to Speed Approvals for Cheaper Copycat Drugs

The agency announced moves to cut regulatory obstacles for the makers of biosimilar drugs, which are akin to generics and may help lower drug costs.

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Pig Kidney Removed From Transplant Patient After Nine Months

Tim Andrews, 67, lived with a genetically modified organ longer than any other recipient.

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In Fight Against Malaria, an Unexpected — and Snuggly — Shield

Treating baby wraps with a mosquito repellent shows promising protection against a top killer of children.

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How Private Equity Oversees the Ethics of Drug Research

Many drug trials are vetted by companies with ties to the drugmakers, raising concerns about conflicts of interest and patient safety.

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New Treatment Shows Promise for Huntington’s Disease

A gene therapy injected into patients’ brains slowed progression of the disease by 75 percent, preliminary findings reported.

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