Nurith Aizenman

A new study suggests kids in poor countries benefit hugely from having older sisters — who are more likely than brothers or even mothers — to engage in stimulating play.

It's part of an ongoing back-and-forth: Republican presidents ban U.S. funds for foreign aid groups that 'promote' abortion, Democratic presidents revoke the ban. This time things could be different.

As the U.S. enters the most challenging phase of the pandemic to date, states are reimposing different kinds of mitigation measures. This time around, experts are offering a wider range of solutions.

Steve Davis lays out the reasons for his (relatively) rosy outlook In his new book: Undercurrents: Channeling Outrage to Spark Practical Activism.

The authors of the "Global Burden of Disease" report track the toll from every conceivable cause of death or disability. This year they also share intriguing solutions that give cause for optimism.

Nine months after the first reported fatality in China last January, the world has hit a sobering milestone.

The forecast comes from the University of Washington's Institute for Health Metrics and Evaluation. But here's why some other disease specialists are highly skeptical.

An inexpensive way to help kids in poor countries: hand out deworming pills so they're healthy enough to stay in school. A study by a Nobel Prize winner finds 20 years on, they earn higher wages too.

Forecasters say the coronavirus outbreaks across the South have been seeding a resurgence in the Northeast. Consequences could be severe unless the Northeast steps up social distancing immediately.

How can communities stop coronavirus case surges without crushing the economy? Some scientists say widespread mask wearing may be more than a helpful precaution — it may be the solution.