While KP.3.1.1. remains the predominant COVID-19 variant in the United States, the XEC variant has taken the No. 2 spot — and is on the rise. XEC has mutations that make it highly contagious ...
Dr. Eugene Braunwald is often called the father of modern cardiology. He calls that an exaggeration. "Maybe I've been around longer, but there are a lot of people who have made major contributions to ...