New viruses and diseases, previously found only in tropical climates, are reaching Europe. Researchers in a high-security lab on the Baltic Sea island of Riems are working to put a stop to these dangerous viruses.

Explore how your immune system’s vast network of cells, tissues, and organs coordinate your body’s defenses against bacteria, viruses and toxins.

The Black Death killed around one-third or about 25 million people in Europe during the 1300s. This is a staggering number, which is why the Bubonic Plague was once the most feared disease in the world. Don't miss today's epic new video that reveals where...