BENJAMIN MUELLER

Updated Covid vaccines, expected soon after Labor Day, were designed to thwart Omicron variants. But money to distribute them has dried up.

At the peak of the Omicron wave, Covid killed Black Americans in rural areas at a rate roughly 34 percent higher than it did white...

The government has greenlit new vaccines to defend against the latest Omicron variants. But the shots won’t arrive until the fall, and cases are rising...

Most Americans now carry some immune protection, experts said, whether from vaccines, infection or both.

Patients whose brain injury coincidentally relieved their nicotine cravings may help unravel the neural underpinnings of addiction, a new study suggests.

Patients whose brain injury coincidentally relieved their nicotine cravings may help unravel the neural underpinnings of addiction, a new study suggests.

Researchers identified a protein in the fluid that could boost the cognition of aging animals — and might lead to future treatments for people.

The coronavirus remains new enough and its long-term effects unpredictable enough that measuring the threat posed by an infection is a thorny problem.

Childhood environments shape people’s navigational skills, researchers reported. The findings one day may lead to better tests for early dementia.

Given the surge of Omicron cases in Asia, the new research lends urgency to vaccination campaigns in China and Hong Kong.