Karen Kaplan

If you were counting on a coronavirus infection to keep you safe from COVID-19 without having to get a vaccine, scientists have some bad news: It won’t work.

The Centers for Disease Control and Prevention said people who are merely overweight, not just the obese, may be at high risk of a serious case of COVID-19.

UCLA professor Andrea Ghez and two other scientists are awarded the Nobel Prize in physics for their pioneering work on black holes.

President Trump has risk factors that make him more likely to experience a severe case of COVID-19, including his age, sex and obesity.

The median age of people with COVID-19 in the U.S. has declined, with adults in their 20s now accounting for more cases than people in any other age group.

A study of patients who came to UCLA clinics and hospitals to be treated for coughs suggests the coronavirus may have been in Los Angeles by Christmas.

Top executives of nine drugmakers likely to produce the first coronavirus vaccines signed a pledge to boost public confidence in approved vaccines.

The prevalence of depression symptoms in the U.S. has more than tripled in the COVID-19 era compared to the period before the pandemic.

Tests that look for the coronavirus in samples of saliva are about as reliable as tests that require a sample from the back of the nose, two new studies show.

One of the hallmarks of the COVID-19 pandemic in the United States is that it disproportionately strikes people of color. But it doesn’t have to be that way.