Tim Lahey

New research supports the idea that social isolation is detrimental to physical health—and that companionship may improve it.

Advances in medicine can prolong life, but they can also make it more difficult for doctors to know when a patient has truly died.

Rates of physician-induced infections have plummeted in recent years, new research says. But there is still little incentive to prevent them before they happen.

With research findings widely available on websites and Twitter feeds, it's easier than ever to oversimplify the results—and risk bringing half-formed ideas into America's classrooms. 

Monitoring gay bathhouses and mandating condoms for porn actors are quick fixes that won't replace the long, hard work of HIV prevention.

This past week we learned 15 patients in New England were exposed to a untreatable infectious disease called Creutzfeldt-Jakob, which is a relative of the human form of mad cow disease. An infectious disease specialist puts that in context.

Churches are encouraging patients to leave their lives in God’s hands.

An infectious-diseases specialist breaks down the reported breakthroughs

Parents who insulate their children from disappointment may rob them of the chance to develop self-esteem—and a good bedside manner.

How to help everyone prevent the looming "antibiotic apocalypse"