For decades, qualifying for Medicaid has largely depended on income. Soon, for millions of Americans, keeping Medicaid coverage may require something more: proving they meet new work-related requirements. Federal officials…

Most people assume that scientists studying dangerous viruses routinely transport samples across international borders. And they do. But according to federal prosecutors, that process only works when researchers follow strict…

For decades, Americans have been told they live in the country with the best medical care in the world. And in some ways, that’s true. The United States is home…