New Covid Shots Recommended for Americans 6 Months and Older This Fall

New Covid Shots Recommended for Americans 6 Months and Older This Fall

As the virus continues to mutate, scientific advisers to the C.D.C. are urging Americans to roll up their sleeves again for annual vaccinations.
Gilead Shot Provides Total Protection From HIV in Trial of Young African Women

Gilead Shot Provides Total Protection From HIV in Trial of Young African Women

An injection given just twice a year could herald a breakthrough in protecting the population that has the highest infection rates.
Researchers Say Social Media Warning Is Too Broad

Researchers Say Social Media Warning Is Too Broad

Some scientists who study youth mental health say the evidence does not support the notion that social media is harmful per se.
On Titan Submersible Anniversary, World Rethinks Deep Sea Exploration

On Titan Submersible Anniversary, World Rethinks Deep Sea Exploration

A year after the first deaths of divers who ventured into the ocean’s sunless depths, an industry wrestles with new challenges for piloted submersibles and robotic explorers.